Putting together a setup for OT & A synth

Just been thinking of wanting to put together something like what’s in this video for a performance & general mobile setup. I reached out to the person who made the case shown in this performance, however I haven’t received a response, so most likely they just aren’t making them, as far as I know anyway. So if anyone here has any alternative suggestions or even something I may be able to put together myself as I’m fairly capable with some things if need be, I would greatly appreciate the input.