There are plenty of threads that I've read here regarding this where many have stated the rubber expandable freeze plugs can last for years. I had a bad freeze plug on the back of the drivers side cylinder head right where the PITA air injection exhaust cross over tube is bolted and bought a rubber expandable plug from Napa which I still have brand new...lol lol..., they come in all different sizes not expensive, maybe $6-8.00 range..?
I decided to try/use the metal OEM plug which I managed to tap in but the trick for either style plug is to clean the FP hole in the block and smear some Loc-Tite in there and the plug will stay in place nicely.
Good Luck ~ :thumbup