Here is a link to an auction for the black wheels & tires. I bet they go pretty cheap as the seller states local pick up only. Someone may be able to get them shipped if they offer $50 - $?? extra over the bid price?? Never hurts to ask the seller before you bid....
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2486686244&category=43983