I have 4 or 5 new in the box Robertshaw brass thermostats.  These are the preferred full body, high flow design, and were actually made by the Robertshaw Controls Co.  160 degree.  9.50 ea. and no shipping charge within US.  Can ship outside US for cost of International first class mail, which isnt too outrageous.  For Y and other engines.

Mike

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.