Per Brian Nystrom:
I've repaired several of them and it's not difficult once you make
the forms (two discs and a ring). If you intend to repair your own neck
seals going forward, make

Jigsawed the discs, did a trial fit and.... Oops! Looks like Kokatat either
subscribes to a different neck seal standard than my other dry suit makers or
they have their own. The seal I got from NRS (which lines up perfectly with my
Bare Polar...) needs a 7.5"/10" ring instead of a 6.5"/9.5" ring.

So I made a second ring... but discovered what I should have figured out
beforehand: the resultant footprint of the seal doesn't match up well enough
with Kokatat's neck opening.

I think I'll just do the seals on my old Bare, use that, and send the Kokatat
off to an outfit in CA that also does mods - since I also want the belt tunnel
about 3" lower anyhow.
--
PeteCresswell