Originally Posted by
makitmama
There is a reason that shuttle bobbins stopped being made- they are a little more temperamental, IMHO.
OTOH, they continued to be made for a long time after round bobbins came into vogue. I think Singer made the 128 into the 50s and I wouldn't be surprised if New Home vibrating shuttles weren't being made until then as well.
Belts and pins are easy to find (sew-classic) and even the shuttles and bobbins are relatively easy to find (someone mentioned that sew-classic carries these as well but if they don't they're easy to find on eBay.)