1993 Corsica 2.2 Fuel line feed

Hi, I am new to this forum. Thanks for still loving this little gem from GM! It seems the o-ring that fits between the fuel feed line and the manifold is no longer supported by the dealership nor can they tell me the part number. Is there a source for these elsewhere?

The OEM is a 9/16" OD precisely .107" thick. I found a .97" thick replacement that when doubled-up, worked.

Just make sure it's gas compatible.

I guess no replies are better than guestimations.