I have a near perfect 82 Supra. the 82's had 4 vacuum switchs near the thermostat. I have been looking for a working White 3 port vacuum switch part number 25810-43010. I have managed to get my hands on at least 8 of them and none of them work. does anyone know of a source for good vacuum switchs or a work around to get my car running properly. thanks any help is greatly appricated.