My son just turned 15 and wanted a "classic" for his first car. We purchased a 1977 Maverick, 250 cid automatic with a/c. We are currently performing some minor repairs and maintenence to get everything operational again. One issue with the a/c system is the vacum control switch in the dash is broken. I've checked with the Ford dealer, parts stores and salvage yards and am having trouble locating one. Can anyone help? Thanks