ebay is good, but watch out for
1) chinese vs comet 40 series, chinese are typically less than $100 and the comets are over $100 for just the driven.
shipping prices,
2) belts... whatever you do, dont get a cheap belt, the genuine comets are about $35-40 and are well worth the money, I got sucked into buying a cheap like 10 or 15$ belt and i compared my worn out 10 yr old comet belt to it, and the worn outcomet was THICKER (same width) than the new chinese one.... wtf?!
also go powersports sells the
40 series torque converter parts
mfg supply has a good selection, also bmi karts, amazon, blah blah blah, just google it right?