Okay, but if you do want to make the deal sometime, I live in Eastport, U.S.A.Ha! Sorry, I will be winter camping in the Blue Ridge on the 3rd, nurturing my inner Hillbilly.
You boys are hard task masters! OK logged in to McMaster Carr - here are the specifications:
Product Detail
Chemical-Resistant Multipurpose O-Ring, Viton®, 3/16 Fractional Width, Dash Number 326
About $1.14 USD each, 10 to a bag.