It's my understanding that they're the 4x4.5 5 lug, ya?
In which case, the world is your oyster. Pretty much all RWD Chrysler products, Ford Products, and AMC products wear the same bolt pattern, among lots of other stuff. There are exceptions to that- some newer fullsize GM B-bodies ran 5x5, as did Imperials and Ford truck/vans, 1985 and newer Dodge truck/vans, etc. But if you see an old wheel on some 60's Mustang or Charger, it has the same bolt pattern.
Like those spiffy 5 spoke bullitt style 17s on newer Mustangs? Same bolt pattern too. Pretty much all '94 and newer Mustangs have that bolt pattern.
I can't say much about whether all these wheels will have good offset for your case or whatnot, but you've got a LOT of options.
It scares the bejesus out of me that someone, somewhere ordered the Lusitania with front drum brakes.