Where to get belts for Yamaha PX-3?

Did some intensive internal cleaning on my Yamaha PX-3 and found that the 3 small, square drive belts for the tonearm assembley have some minor cracks showing. Figured I'd just go on eBay and find them from some supplier but no luck.

Anyone here know where to get such belts for this table? It is otherwise like new so I want to maintain it properly.

Thanks,

Anovak