I did my own spin on this. I got a hold of an upright freezer for a measly 80 bucks. This upright freezer had the coils between the drawers and I was able to bend the middle one down into the drawer, fill it with glycol and use it for a glycol chiller.
I did a writeup on this on reddit:
It worked rather well, much better than expected. I was able to drop the temperature of the water in my chronical from 23 degrees celsius to 4.5 degrees celsius is 12 hours, and the freezer was not even running all the time...