Danny Wincott the man behind Sample Diggers has alerted us to some work going on it the Reaper forum to get a Control 24 to work with Reaper using a Python Script.
Its early days, '2mmi' has managed to get the faders, pan, ch-strip-display, and meters working and it is on Reaper as demoed it this very short video....
It is still a long way from working fully and then there will need to be similar work done to enable it to work with Pro Tools but a very small light at the end of the tunnel none the less.