Prototype PCB for the LC MACAA worked without a hitch. The board was just a little too large, so I’ve shaved it down and ordered a second revision. Also found a compatible power supply connector housing and pins.
The LC MACAA can be a complete drop-in replacement for your original LC power supply, with no soldering necessary (unless you feel like it). Next is the 3d printed mounting bracket and final wiring setup. LCs need 12v, 5v, and -5v. The MACAA board provides 5v and -5v from 12v – you can use either an external 12v power brick or the Mean Well supply that I found fits perfectly into the original width.