I wish I had bought a few Axis-49 controllers when they were in production. They were a much more reasonable $500 at the time.

https://www.c-thru-music.com/cgi/?page=prod_axis-49

You might be interested in the Hexboard. Basically a mini-lumatone for ~$500; main downside is no velocity sensitivity.

https://shapingthesilence.com/tech/hexboard-midi-controller/

I'm quite happy with mine, and play it with the Wicki-Hayden layout.

https://en.wikipedia.org/wiki/Wicki%E2%80%93Hayden_note_layo...

A Lumatone is $4250, though!

For programmers only :(