Don't forget that the Goldwing & Hondamatics had DID aluminum rims. You should be able to find them pretty cheap on ebay. I paid around $50 for a whole GW front wheel - rotors and all, but paid $80 for an Akront 16 x 3.5 - just the rim. Admittedly, the Akront was already polished & pretty much NOS, but still, money's money. If you get one of the old DID rims, they were anodized, so it takes a bit of work to get them back to full polish.
-Jay in Philly