Broken tabs not that big an issue, something I figured out when using a heat gun and ABS to build the cooler ducting.
I had started a major project fitting 3" DS1 projectors and just have not gotten back to work on it so needed a headlight for a temp solution, bought one on Ebay for cheap with the mount broken by the top of the radiator. I just sealed it aluminum ducting tape, not duct tape, but saw a way to make it better using some ABS sheet so I heated up a piece with a $20 heat gun (have a pro level one in storage) and it was so easy to do, riveted it on but decent screws would work, some Goop to seal it and it came out working just fine.
Cost was pennies to fix the broken mount, buy broken ones and go to work on them, not a big deal