well, I'm not in MI, but shipping shouldn't be too bad.
I have a set of latches from a 87, not sure if they would work for yours or not. They aren't seized up, but could use a little cleanup and lubrication.
Actually have all the internals from this 'gate, so if you need other parts, let me know.
If the latches will work for you, make a offer (with shipping) and we'll see if we can work out a deal
Hey I have both latches from my 86, if you need them let me know. You can see them in my SF site under tailgate parts.
the drivers side one I broke the plastic window switch when I pulled it out. but they work well, probably need grease. They have been in the closet for over a year. As for the switch you can do like I did and splice the wires together that way you need to work on the tailgate you can drop it then roll the window up. (discamer) you must support window or it will break.