FumeHood doorhandle replacement

A Laboratory FumeHood doorhandle can brake in parts because of their age, heavy use or whatever, On our lab we had a few doorhandles which needs to be replaced, but it's an old model so a bit difficult to get. And ofcourse expensive. Not really my problem, but it's fun to make something and to see that it's used every day!

The doorhandle has 2 different parts: attach them into the hole of the FumeHood window and
use 4 screws: size 2,5mm, length 12mm.