1986 Iroc Z28

I'm trying to find a Brake pedal to booster shaft retaining clip. for my 86 iroc z I just purchased the car some guy had zip ties holding the clutch and shaft together that broke off as I was driving so I was unable to shift luckily I was near an empty lot and popped it into neutral and glided into a parking spot, I fixed the problem walked home got some tools came back fixed it up then. On my way to work I lost my brake pedal it fell to the floor was like a swing i pull over check it out and no clip at all holding the brake pedal to the booster shaft was trying to check all hardware stores/auto stores in my area and was unable to find anything, I was hoping someone on here had one they could sell me or I'll probably have to check out a junk yard sometime over the weekend...thanks much for your time and concern. Hopefully someone knows where I can find a brake pedal to booster shaft retaining clip..