If you're aiming to hit up a junkyard to get a set of cheap wheels & tyres I did a bit of google searching a while ago and found a list of cars that have the same lug pattern as the Bronco. It's a bit European centric list but may help if you go the route of looking for a reaaly small set of wheels to fit.
It's not my list, so I cannot guarantee it's error free.
Niva (2121, Hussar, etc) fitted with 16 x 5 wide, (ET55/57mm, ie a High offset)
Wheels: disk stamped, rim size 127J-406 (SJ-16). Tyres: radial-ply 175/80R16 with 315 mm static radius or cross-ply 6.95-16 (175-406) with 322 mm static radius.
Cossack (aka Turist, Toro, etc) OEM rims - 15 by 5.5 or 6, (H offset), different brands (ROH, BWA, etc) vary slightly in different markets.
LJ 80, SJ 410, SJ413, Jimny, Samurai, Escudo, Sierra, Caribbean, X-90, Vitaras & some Grand Vitaras mostly 15 x 6 (L/M offset, -10...15mm)
Sidekick (USDM) 96 - 97, 16 x 7 (M offset)
Vitaras & some Grand Vitaras (USDM) 98 -, 16 x 7 (L offset)
Maruti / Maruti Udyog
Gypsy mostly 15 x 6 (L/M offset, -10...15mm) (Indian licence built Suzuki SJ)
Sportage '93/94 on, 15 x 7 (L/M offset, 0...-3mm) (later Sportages have 6 studs)
Sorentos '94 on, probably 16 x 7s, (L, 0-3mm)
Taft/Scat: F10, F20, F25, F50, F55, F60, F65
F70/Fourtrack/Rugger/Rocky/Wildcat/Feroza probably 15s (offset 0...-3mm)
Ram 1500 4WD
Ramcharger 79-83, 15 x 6.5 (all L offset)
Ram Charger 88 93
Ram ½ ton truck (2wd and 4 x4) 94 on, 16 x 7
Ram van 85-96, 15 x 7
½ ton truck 4x4 79 83, 15 x 6
½ and Ύ ton truck 84 93, 15 x 7
Drover (Australian rebadged Sukuki SJ) (L/M offset, -10...15mm)
ON360 (progenitor of the Suzuki LJ)
All CJ Jeeps 46 85 have 5x139.7 15 with either 4.5/5/6 rims (L offset)
Also Jeep full size trucks and wagons up to 1972; & C-101 Jeepster Comanando '67 to '74 (dont mistake them for the 5x114 fitted to Cherokee/Wrangler and modern 5 stud Jeeps)
Jeeps (licence built):
Mahindra (Jeep, India), Mitsubishi (Jeep53 98, Japan), Willys Colombia (Jeep 99), Willys Overland do Brasil/Ford (Jeep 54 83, Brazil), Kaiser Argentina (IKA) (Jeep 56 78, Argentina), Tόrk Willys Overland (Jeep 80s) Hotchkiss (Jeep 54 70s, France), Nekaf (Jeep 56 62, Netherlands), EBRO (Jeep 53 - 85, Spain), Hadonghwan ('54-??, South Korea), Pars Khodro (Iran). All unconfirmed - certainly 5 stud, and very very unlikely to be anything else.
Ford M151 Mutt Jeeps 59 78 (unconfirmed - certainly 5 stud and likey to be based on the Jeep PCD; also they have a pretty H looking offset). Early MUTTs had cast mags (oval slots).
All Scouts have 5x139.7
All USDM Fords '28-'48 (?)
Mercury - all '39-'51
Post-WWII Jailbar pick-ups
F series trucks 54 95, 15 x 6 (L offset) (dont mistake them for the 5x135s the 96- F 150s had)
Lincoln - all '52-'60
Bronco 66 '96, 15 x 6 and 7, (L offset) (dont mistake them for the 5x114 the Bronco II (82 90) had)
½ ton E-100, 150 van, 70 96, 15 x 6, (L offset)
Econoline E150, 88 94
ie you could fit the legendary Ford 9 inch diff - and keep stock rims!
Chevrolet / GMC
Tracker, Vitara (USDM) 98 on, 15 x 6, 12mm X 1.25 (L/M offset, -10...15mm) (US rebadged Suzuki)
Niva 2 (re-badged Lada)
Sunrunner (Canadian rebaded Suzuki) (L/M offset, -10...15mm)
8 cyl. & wagon '46-'55
Tracker 2WD 1989-1998
Blizzard (re-badged Daihatsu)
Landcrusier V8s are listed as 5x1.39.7s in Russia, but I suspect an error (ie actually 5x150 as the Cruiser is listed in other markets, but who knows maybe their V8 'Cruisers have Daihatsu bits for some bizzare reason).
Delta Motor Corp (Phillippines)
Mini Cruiser (Daihatsu F20 based miniture version of the Toyota FJ40), (unconfirmed - certainly 5 stud, and unlikely to be anything else)
Commercial LC3 LC5 (50s) (unconfirmed, looks right but need numbers?)
Proceed (Japanese rebadged Suzuki) (don't confuse with non-Suzuki based Proceeds)
AZ-Offroad (Japanese rebadged Jimny) (L/M offset, -10...15mm)
Scorpio (unconfirmed - 5 stud, and they make Jeeps so maybe...)
Safari (unconfirmed - 5 stud, but they made Mercs so maybe not)
various (ET 20, 106.0 mm, 6x15, 6x16)
various amphibian & utility models (unconfirmed, but they look right and were once owned by AvtoVaz), Offset High
Silver Cloud/Phantom the ultimate 18 bling rims for a Niva if you can ever find a set.
Daihatsu based Italian 4x4 (powered by BMW!)
C202 & Valp L3314 models (not the C30 models which have an 8 bolt pattern) had 6.50-16" or 5.50-16" rims
Vitara and 300/350 (Spanish rebadged Suzukis) (L/M offset, -10...15mm)
H = high or positive offset, typically +45, 40, 35mm (typically front wheel-drive)
M = typically + 20mm offset
L = low, typically 0 or negative offset
Hope the list helps....