Last summer, I needed to quickly create a holding structure for my “terrace computer.” To control the lights, the pump in the fountain and a small irrigation system, etc. Totem was the solution
DIN Rail clip are standard WAGO p/n: 209-123
https://www.wago.com/global/rail-mount-terminal-blocks/mounting-foot-with-screw/p/209-123
It is 0.4 mm wider, but easy to grind. I changed the supplied screw to a metric M3, which is compatible with Totem nuts.
So nothing special, but I think it can be a little inspiration for others