I have found 88 year old man from Tennessee that rebuilds these thermostats for around $300, pp. I sent him the one I that was in my ’36, along with another core I bought to check out (it was bad too) I have both back now, and would sell the core for $60, which is about what I have in it.
Are you referring to the radiator shutter thermostat?
If so it would help a lot of us here if you give us his contact information (if it is okay with him)
I’m sure many of us could use his service(s)
I have misplaced the contact number. His last name is Otto. I will look for it, sorry
Jim Otto rebuilt my thermostat bellows in 2013. This from my contacts list.
Jim Otto
10700 Alameda Drive
Knoxville TN 37932
865 256 4774
Thanks Rich. Swore I had kept it