Another thread.
http://volksrods.com/forums/index.php?showtopic=9985
Billet adapters is pretty much the only ways to get them, plus the limited selection of tire$ to use them are pricey as well. Or buy new modern repros with more standard lug patterns and cheaper tires, rims costs more but everythign else is cheaper. Either way it's going ot be $$. Main reason why I dropped mine from my project.