Factory GM rag joint ???

[70TWO NOVA]

Hey guys, I'm having an impossible time finding a factory GM rag joint for a second gen Camaro (1980 camaro z28) I've bought the ididit universal one....way too big with wrong hardware. I bought the Detroit speed one.... Came assembled and looks nice, but still way too big. I swear I've searched everywhere and can't find one. With the popularity of these cars you would think this would be an easy part to find. All I'm looking for is a bone stock factory rag joint. Does anyone know where I can get one???