Norns is made and supported by Monome, and it is very much supposed to be a Product That You Can Buy... except unfortunately it's based on the Compute Module 3,

Norns is made and supported by Monome, and it is very much supposed to be a Product That You Can Buy... except unfortunately it's based on the Compute Module 3, which has been unavailable for a good while. They have been available in small batches occasionally over the last year, and hopefully will be more available soon.