Just for a bit of MacGyvering I use these mobile phone peltier coolers that easily clip onto the back of a ZWO camera with a bit of extra rubber for the grips to fit (cooler size 67mm - ZWO diam 62mm). I also use a CPU/GPU thermal heatsink pad to ensure good conductivity. And then I use the same power brick as I do for the Daystar Quark to run it. They do work surprisingly well!
You can get them from AliExpress
https://www.aliexpress.com/item/1005004532226683.html