[GreenKeys] Teletype 43 ribbons?

[Charles]

My box of five cartridge ribbons for Teletype 43 is old and dried out. There 
does not seem to be any current source for these ribbons that I can find. 
Does anyone know if new ones can be had anywhere?

Some years ago when I first got the 43, I had bought some ribbons and found 
that the loop was too long and the tensioner could not keep it tight enough 
to advance the ribbon during carriage return. I contacted the manufacturer 
(don't remember who) and after a discussion with one of their engineers, 
they admitted that they had indeed made a bad batch, and sent me a box of 
five with the correct length loop :) unfortunately those are all dried out 
now.

In the meantime, I drilled a small hole above the foam ink roller (inside 
the cartridge), shot in some WD-40 and waited for it to soak into the 
roller.
That seems to be working adequately for now, but who knows for how long...