I thought I'd read somewhere else (this forum or other) that old Ford pickup or Pinto rims would fit(?) Maybe some weldig for the off-set would have to be done.
When I was shopping for chrome wheels for my Tri-Glide I checked out the Mustang wheel becuase of the 4 bolt pattern but was told that the off-set would not work.
Maybe I'm in the minority, but I like the looks of the stock TG wheels...better chromed. I do like the fact that HD matched the front and rear wheels...I may do the exchange after I get the mods done...
If you're looking for something as simple as a chrome reverse wheel, hot rodders call that a 'Gennie' wheel, pull a wheel and measure the offset and a vendor like Stockton Wheel or Wheel Vintique or Newstalgia Wheel can make the rims for you. For wires, Dayton Wheel makes them.
I like Casper like the looks of the stock rims. Sure would be nice to be chromed though. Who knows what will happen. If anything I would have them chromed.