I just ordered and received 2 spindle bearings for my 1013 from this site:link
These were $7.70 apiece + shipping, After doing a clean up on the machine I found that there was a lot of slop in the existing bearing which I think has been causing some unwanted lines in some of my carves. Have not put them in yet but I'm sure they will be better than the ones currently in use. Next will be to replace the thrust bearings on the X and Z axis. I have not nailed down a source for those just yet. These are just wear parts and after my machine being in service for 7 years at this point I think it will be a good idea to just replace these.
Will be interested in hearing how they work. Haven't had time to do much carving lately myself, building furniture for the kids and now will be building myself an office desk, may do some designs on the leg pieces.