I have 3 partial Model M 122-key terminal boards that I harvested keys and springs from. 2 are black label 91 models (as I remember) and 1 is a Lexmark from about 1994-95.
The cases are good, although I only have one cord (you won't need it if you are doing a Teensy project) as are the barrel plates, etc.
Obviously, I am selling them as-is for parts, but if you are experimenting with case painting or modification, or building a ghetto-unsaver, here you go.
I could fit 2 in a USPS flat rate priority box, but not 3. I would cram whatever would fit in there, if you wanted, such as 3 fronts and only 1 or 2 backs, something like that.
I would include 122 springs and key stems loose if you want them.
Any offers for these?