I want to thank Janey and Mickey for help on this one, which I first posted about here:
Should I buy this machine?
I was able to buy needles and bobbins with their input, and Janey sent me the manual as well. The machine is ready to pass on to one of my sisters who apparently treadled quite a bit 40 years ago or so, I am hoping she'll give it spin.
It turns out I already had the motorized cousin to this machine, a Free Westinghouse Type J, so now I have a few extra needles and bobbins for it as well.