Henry puts together a nice gasket set with the Viton seals. I believe he sources it from Wrightwood Racing.
Porsche Parts Sales
I don't mean to send business away from Pelican. However if someone wants the Wrightwood gasket set, Pelican doesn't carry the kit for the 993 engine.
Agree 100% with Alfonso. Any of the guys he mentioned will have a great recommendation for gasketing your engine.