I bought mine from a semi-local RX8club member.
The trick to that board is "patience". And timing. As popular as rx8 rims are in the MZ3 community, there's alot of competition to buy.
You can also try Ebay, but buyer beware. Bookmark this page; http://motors.search.ebay.com/Rx8_Wh...efZC12QQcoacti
onZcompareQQcoentrypageZsearchQQcopagenumZ1QQfcclZ 1QQfclZ3QQfromZR2QQfrppZ50QQfsooZ2QQfsopZ2QQftrtZ1 QQftrvZ1QQmppfqyZRx8QQsacatZ33743QQsamcmZ6028
That's what I used when i was searching ebay for the wheels.