As 12many said the nylon gaskets are much better than anything else. Even the paper gaskets.
I only use the Superformance gaskets on carbs any more. For about 40 bucks shipped you can get his kit with all the gaskets in it, although now that I've typed it out...I'm not sure it has nylon squirter gaskets in it. Damn.
In that case, you can go to any GOOD hardware store and they should have some thin nylon gaskets for cheep in their bulk section.
I still suggest the Superformance gasket kit because they are the best I've found, but I don think it has squirter gaskets in it. I may call him and make that suggestion. Greg is a great guy. Who knows...he may add them to the kit if someone asks.