Edmund H. Ramm wrote:
In Rob writes:

[...]
When it is really the IC that is defective, and can no longer be obtained,
[...]

Hasn't "Most Famous Junk" bought out Curtis some years ago? Probably
wouldn't hurt to ask them.

73, Eddi ._._.

Yes, that is what is written on internet. I presumed that asking
over here means that MFJ no longer has them in stock either.

Well, that Arduino keyer can do a lot more anyway. A friend nearby
has built one and he can even connect a PC keyboard instead of the paddle,
and it has memories etc.