Source For 67 Rochester BV Choke Thermostat

[daytho1]

Does anyone know of a source for a 67 Rochester BV Choke Thermostat for a 250cid?  It appears that they're scarce as hens teeth.  Thought I had a source at Obsolete Chevy but they sold their last one in April.  Were these used on other models or is there a cross reference for the part number.  I have 3821564.  Can you replace just the thermostat spring or is it an entire assembly?

[daytho1]

Interestingly enough, I was able to procure one from RockAuto in Illinois.  Their part number was 779-601 and was listed to fit a 68 Chevy Nomad 230 L6 with automatic transmission.  Turns out to be a GP Sorenson choke thermostat which they appear not to manufacture any longer.  If anyone is interested, their wholesaler is closing out the inventory and has only 1 left.  It installs perfectly and seems to function properly as well.

[Insp4]

 I just ordered it. I have a 68, with a torque drive, (cheap powerglide!) Hope it'll work! Thanks!