Yeah, hard to get them nowadays. They never made very many of them and the remaining ones are 20 years old now. There have been attempts to re-create it over the years, getting the switches to feel as good as the originals is probably the most difficult part.

These might be the closest ones yet: https://github.com/JesusFreke/lalboard

and the v2: https://hackaday.io/project/178232-lalboard-ergonomic-keyboa...