FWIW I’ve run the grid from the TPS80W for a long time and never had any problems. (I did recently fry a couple of my monome modules but that was due to a faulty cable and another power supply… )
That being said, you could wire the switch up to the second set of power lugs on the TPS80W. You’d just have to carefully solder some wires to the right pins of the barrel connector of the switch and then run them to the power lugs.