I found this on Sweetwater, seems to be completely customizable (even, unusually, the transport buttons.)
https://www.sweetwater.com/store/detail/A300Pro--roland-a-300-pro-keyboard-controller
In the same vein is the Novation Launchkey Mini MK3 and the Arturia Keylab Essentials controller.
Does this Roland seem like the perfect controller for the Digitakt to you? Cause it does to me!