This used to happen to the AMD sockets back when I think they were socket 462 or maybe it was the older gen.
Many heatsinks would grab the center tab on 1 side but AMD had 3 tabs to each side of the socket so it was just a matter of finding a heatsink with a clamp that used all 3 tabs on both sides. Sometimes the clamp could be reversed if it grabbed the outside tabs on one side and center on the other depending on design of the heatsink.
I think measuring the distance in millimeters will get you to a better idea which part is causing this.
I found a manual that says for toner cartridge: Drum is 62.9mm, Developer roller 35.1mm, Charging roller 26.7mm, Supply roller 47mm
Fuser parts are: Pressure roller 75.4mm or Fuser roller 77.5mm
You should be able to measure from 1 line to the next to see what’s closest. Sometimes they are hard figure out when they are similar sizes but these are different enough it should get you an idea where to start.
Would something like this work? It has a 3 tab clamp on one side, center tab on other way. Not sure if that would stress it out and break too or just not sit correctly since you’d have the heatsink on backwards technically
It’s been too long since I seen these type boards. Heard of someone using a dremel on the broken area around the tab to make a tab but that seems extreme and no way back if it fails.
https://www.ebay.com/itm/115876556377