HELP!! White Model WA20 with a 140A 362 cu. in. flathead six cylinder engine. I’m the 2nd owner.

I need a water pump pulley, please, for a 1945 White Van/Pelt fire engine. It’s a #973, double sheave with a pump shaft hole that mics out at .788. I could also use a new/rebuilt #612 thermostat ass. if available. I’m on the West Coast. Thank you