I'm locking for a type of switch assembly that is like a support/bezel for toggle switches in order to make them recessed in the front panel.
I know it was used in the Nagra IV recorders line and also some gear from other manufacturers in the early 70s, like Helios DI boxes.
It's this part:



Does anyone know any info on these parts?
Sources for it?
Or any other equipment that might have used them?
(I already did extensive searches in google and this part doesn't show up, and I already contacted all the Nagra parts services I could find, althoug this part was not made by Nagra and other brands used it also in their products)
Thank you so much for your help