I'll look around for you and will place a small posting on our Dutch
collectorslist (cvml).
Thank you.
May be something comes up (not a great chance).
I think it's unlikely. The HP120/HP125 machines don't seem to be that
common (and after looking at the internals, I can see why, I don't think
it's a particulalry good design!).
Anyhow, I think I've worked out how to interface the HP2523 keyboard and
modify the HP150 one. All (!) I need to do is find the bits and solder it
all up.
-tony