designed a replacement for the broken bracket
You need this additional hardware:
2x M3x12 screw
2x M3 Hex Nut

I'd suggest buying a set like this:
https://www.amazon.de/Edelstahl-Sechskopf-Knopf-Schrauben-Unterlegscheiben-Sortiment-Aufbewahrung/dp/B073SS7D8J/ref=as_li_ss_tl?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=1T4HW4LZ73OBJ&keywords=m3+schrauben+set&qid=1577484197&sprefix=m3+,aps,185&sr=8-5&linkCode=sl1&tag=chrisbittenau-21&linkId=bba99816da320906129742a960527b7c

I've also added the Fusion 360 file if you want to edit the file :)