Is there a Keyrah available to suit an Amiga 4000 keyboard that will allow it to be used as a keyboard for the Sam440?
No.
I have been meaning to cobble something together with an A4000 keyboard case + A1200 keyboard. The Keyrah wont fit inside the case as it is but I think it will if some of the unnecessary pins and connectors are removed, I just haven't got around to doing that yet.
