Bosch sanding plate are crap! They don't last, and are expensive (20€ for only a couple of monthes of grip).
I had a broken Parkside sander which had a perfect plate, very grippy, so here is an adapter for the parkside plate on the Bosch sander.
Printed in PETG with 100% infill. The four hole need to be tapped M4.
Enotepad PETG PETG