1970 Buick GS unusual clutch link at bellhousing

I have been installing new headers in my car, I disassembled the clutch 'Z' bar and all related linkages and at the clutch fork connection is not the common straight push rod set up with a spring pulling back on clutch fork (common design) my car has a setup with a grommet eye bolt instead with a pin and clip retainer at clutch fork. The tech guy Mike at T/A performance said he has seen this set up, it is original but very uncommon. The rubber grommet is shot at the end of the eye bolt, 5" overall length 3/8 course thread rod with 3/8" eyelet for pin. Does anyone know of a source for such a piece ? thanks, Pat