the sad story of Mandir mixers

After the Yamaha AW4416 went for repairs and came back in the same state, it was the turn of the Tascam TM-D4000 to give problems. Then I shifted to lower-tech - an old Studiomaster Diamond Pro. The Yamaha had Midi working, so I tried to use it in Mandir. Reaper had a good solution for the "PFL" problem with soft-mixers - Cubase 4 LE only had solo, which was going into the main mix also, and Nuendo 3.0.2 did not have the "Listen" button assignable to a MIDI controller. With Reaper, I could make a custom action to mute the monitor tracks, and the monitor tracks were being sent feeds from the main mix tracks. The main mix goes to main out, monitor mix goes to monitor out as a folder. So far so good. But then, once everything was set up, the Yamaha just died. Not powering up at all. Researched and found the Tascam TM-D4000 is capable of acting as a midi controller for faders alone. But it would not physically fit into the current rack! So now I'm looking for a low cost (used?) midi controller, preferably with 16 faders and buttons like the Peavey 1600x or the Korg Nanokontrol. And of course, my flash drive also failed...