O'rings For Zero Leak V -Band Clamp Connectors???

I've looked everywhere and cant find the o'rings that are on the zero leak/V band clamp fittings. The O'rings measure 3.750 and 4.250 round and .060 to .070 thick. Its a older twin system and need to know if anybody can point me in the right direction?

Thanks

Have you checked McMaster carr. I’m sure they would have them.

Check here for standard sizes. I can't tell if the 3.75 and 4.25 are ID or OD, but sizes 044 and 045 look close to what you are asking. Find the size, then I normally head to amazon and type in "045 oring" then choose what material I want. A package of 10 EPDM 045 size orings is <$6.

USA Standard O-Ring Size Chart | AS568 O-Ring Sizes