Beseler sells a wall mount kit (like $250, ouch!) for the MX series. I think it would be simple to recreate this with plywood and good bracing. I believe the screws that go into the base are 1/4-20, a common size to find longer ones.
The piece on the top is a brace for the top of the frame. This doesn't need to be amazingly butch, just stiff enough to kill harmonic vibrations and there could be many solutions.
I'm about to buy an MXT and will wall mount it, but I want it to come out 8" or so from the wall. So I'll need a well braced plywood box that I can adjust a bit. I'll likely do the "triangles" at the bottom with 2 layers of 3/4 plywood. Main thing is making everything square and well braced. I'll also screw a large piece of plywood to the wall across several studs.
I currently have a beseler 67c, which I pulled from the baseboard and mounted to a 12" high plywood "box" which has threaded adjusters for level, and the top of the column is mounted to the ceiling. I get very big & sharp prints with no shake.