just make your own like in here:
CNCzone Network: RFQwork :: 3Dstuffzone :: Welderzone
I have been looking for a while to find a company that would sell these. So I made a few for now, need it to go on a 1.5" pipe. If some one knows were I could buy them let me know, Please.
and for bearing just get some skate bearing and press them in there(might not work depending on what size shaft you got there)
how much load are on them?