Don’t know if Snikket pass all your requirements, but have a look:

https://snikket.org/service/

Pattern recognition by Gibson

Lovely raccoon

Lovely looking classic machine !

Looks great!

Interesting to see its height compared to the keyboard. Gives something to aim for.

Can understand the hoovering, to keep your hands free to move where needed. Thanks for the recommendation! Together with the idea to start with a piece of wood, I have now some options to try :)

Sound I could make something my self from a piece of wood! Sand it smooth.

Good way to test the benefit of wrist rest.