Flo-Temp Pfefer products

Years ago, I bought in NYC during a trip from France an accessory to control water temperature in my darkroom.
I am looking for a new one, at least a new plastic part I still have thermometers.
Do you know where I can find it
Thanks for your help.
Attachment 164069

Hard to find but I've seen them on eBay once in a while (I bought one there).
This is still avalable:

http://deltaphotosupplies.com/store/...ok™.html

Much more expensive; having both, I can attest that it is worth the money.