You can buy those dirt cheap now
It is called a tube in shell condenser, and that shit goes fast, as it is a bunch of condensing tubes cooled down with ice water, or, in my case, IPA and dry ice to get it below -50c. (Gets down to -78c but my thermometer doesn't go that low)
You can get one for 2k from "hardware factory store " that you don't even need a chiller or homemade chiller for, it has a big scoop for ice or dry ice.
Shit they are 1100 for a 4" diameter and 2200 for a 6" diameter, but you can scoop dry ice into the area, pour in IPA and it all gets super cold...amazing for recovery of any low boiling hydrocarbon vapor