Try this link and see if you can find the bearing you need :
https://partskit.com/product/search/...hicles&vc=0591 or perhaps email them if you dont see it right off ,they are the single biggest source for Hellkat parts i know of.
Also, Google Kronik Racing in Cali as an alternate idea and give them a call, the bearings are the same for the Hellkat and the Boom 125 so they should be able to hook you up .