Hi Again Auggie
My guess is these machines may be showing up a little more frequently in the next while. The people who bought these units new back in the early 1980's are now moving into seniors residence or lodges and family members are selling off their unwanted possessions. For example, eBay item # 384573290504 is a pica type element for a Brother Correct-O-Ball.
The Brother type balls and IBM type balls are not interchangeable, different size mounting pin and maybe a different tooth count around the base of the element meaning that even if you could get one to fit the other, the rotate function would not mesh properly. For other supplies, just keep your eyes open at estate sales, yard sales and on-line listings. All the best,
Sky
We humans go through many computers in our lives, but in their lives, typewriters go through many of us.
In that way, they’re like violins, like ancestral swords. So I use mine with honor and treat them with respect.
I try to leave them in better condition than I met them. I am not their first user, nor will I be their last.
Frederic S. Durbin. (Typewriter mania and the modern writer)