Designed this bracket to hold the fan and peltier cooler on the back of my Canon r5 to stop overheating issues. The cooler was the bottom of a can cooler I bought on amazon, though if you are a little more patient than I you could probably solder something a little more elegant looking.

Tested 8k raw recording for 2 hours at 95°F with stops only long enough to swap cards when they filled.

Link to cooler:
https://smile.amazon.com/gp/product/B078K81Z4C/