Treats and I have collaborated to bring you aluminum switch bases for magura switches! These are of course much stronger than the plastic (printed or OG), feature M4x0.7 machine screw thread instead of self tapping screws into plastic and are made of 6061 aluminum. These are unlike the other metal bases that are offered from cast pewter which is soft and brittle, more expensive and not tinted. You can find all the hardware and information in the listing. I'm very pleased with the fit and finish, and I think you will be too.
Please note the bit about tidiness of wiring - black annodize is non-conductive, but if you scratch off the finish under the terminals, AND have messy wiring, you could have an issue. I have no issues on my bike with stock wiring and NO barrier, but some cheap insurance against any grounding issues would be to add a small plastic or viny barrier film underneath your terminals.
No more slipping on the handle bars! You can finally tighten the clamp screws without cringing.