I have been thinking of glueing one of these to an aliminium plate and threading on to the back of my secondhand uncool ASI1600.
https://www.adafruit.com/product/1335
Might be an interesting project if it works well enough . I will need a vspour barrier insulation sock for the camera and some heat conducting adhesive along with a fabricated aluminium plate, peltier and control device, or maybe just on/ off.
Any thoughts on whether I could create condensation inside the ASI? Perhaps it would seal well enough.