Merv:
Just a couple of ideas on where to find ball bearings, once you know the diameter: transmission rebuild shops (valve body check balls), gas fitters (check balls), small engine repair shops (carburetor check balls) and under my workbench (if you're real quiet, you can hear them giggling at you from the shadows)

. Most of the sources I found on the 'net are for ball bearings, or manufacturers who want to sell 10,000+ at a time (probably a few more than you need). BTW, there is a site,
www.vxb.com,
which carries fishing reel ball bearings for reels like Daiwa, Shimano, and Fin-Nor in kits of 10 - might be useful to know for another project. Looking at the photos, it's also possible that you could convert the bearing setup to a ball bearing type without machining the bearing recesses. If you'll let us know the diameter, I'll look in my stash of oddballs

and try to match some up.
Pete