source for nylon washer on differential filler plug 7.25" ?

[Lasalle]

Does anybody out there know of a source for the nylon washer on the filler plug on a 7.25" differential? 7/8" inner diameter and 1 7/16" outer diameter. I looked at Ace hardware, not big enough. None at classic industries. Mc Master Carr had them with a minimum order of 25.

 

[Dana67Dart]

Auto parts store.

Amazon

 

[RustyRatRod]

I don't use nylon on anything. I replace nylon and pressed paper with copper gaskets.

 

[Lasalle]

I found one at a local non chain auto parts store. I could not find it on the websites of the chain stores.