Question for the watchmakers.

Hi, just wondering if one of the watchmakers could point me in the right direction.
I am looking for a flat clear nylon gasket for a breitling navitimer bezel.
This is the gasket that fits under the slide bezel.
The bezel is waterproofed with two gaskets.....a rubber oring and a nylon flat gasket that it slides on.
(Please look at pics)
I have searched everywhere to find a generic nylon gasket at all the watchmaker supplies ,but with no luck.
I know that breitling don't sell parts,but
Has any of the watchmakers ever serviced a navitimer, and replaced this nylon gasket?
And is it possible find generic nylon gasket which I could substitute it with.( which supplier).

I appreciate any help, cheers

Take a measurement of the cross section and measure the I.D of where it sits on the case. (Not a. Watchmaker). Good luck