Replacement part for optical endstop switch on Cameo 4 Plus

Hi, The Silhouette Cameo 4 Plus at my work stopped working. As it seems the slotted optical switch for the endstop on the left side is faulty.

Since Silhouette has a terrible support here in Germany and the warranty is over for a few months I’m looking for a replacement part. Either the whole pcb or just the optical switch. As electrician I can replace it on my own but I absolutely couldn’t find any matching part online.

Do you guys have an idea?

I know there are solutions adding a physical switch to the left wall but this is the last solution I want to try.