I need (and turbos86 will, too

) a set of blank-sidewall slicks in size "245/40*17" for my set of Fujimi Work Emotion wheels. Well, the 245 is actually too small... the tires need to be 10" (in scale) to fit the wheels. So really, I need 17"x10" slicks. I wouldn't even mind buying a few sets...
Where to start looking?

TIA!