I'm not an expert on any of this, but regarding "Holley Remanufactured" ThermQuads, Summit Racing has some of them for sale at,
http://www.summitracing.com/search/?keyword=Holley%20Remanufacured%20Carburetors%20Thermoquad&dds=1
This is what they mean by "Holley remanufactured carburetors"...