Noodler's Ahab Flex Flat O-Ring?

[Mendel]

I was wondering where I could purchase (and what size) flat o-ring for my Noodler's Ahab Flex? I' m not talking about the o- ring that goes inside the ink chamber. Rather, I'm referring to the flat o- ring that goes on the threads above the nib section. I"m not sure I'm making sense here.

 

[Devilpup]

I've never seen or heard of one, you may try a combination of tightly packed paper towel and making sure the cap is tight and above the chamber, that's what I did for mine.

 

[Andy]

Perhaps use the contact form on the Noodler's homepage, worth a shot.
http://noodlersink.com/