You have been given the name of the man and the address to request replacement gaskets.
I wore only one gasket, but when I made contact with them I was sent a Gasket for each size Space Case makes.
So i guess this probably rules out all of the above inc the SCS unless they sell me some.
I wanted mine free, as warranty replacement.
Check out the Space Case O-Rings available for sale at:
http://www.spacecasegrinders.com/o-rings/
SCS offers a Lifetime Warranty also, but does not offer replacement gaskets at all
If you lose or break a gasket they will replace the grinder.
You can also measure the SCS, and use a SC oring if the same size.
I do not think anyone.... even the most compulsive among us needs to worry about wearing out a Gasket.
I am the only person I know that ever wore one out.
When I did wear it out after 7 years, that was my ONLY grinder, and was the small size.
I used it to grind about a quarter ounce a day, and removed the gasket weekly during a weekly Iso bath.
That grinder was used abusively, and the Gasket only wore because of the roughness with which I pulled it on and off each time..... having to use a knife to pluck it off the unit, due to limited movement of my fingers from spasticity.