Check this site to see if they carry them. If not, I'd suggest Razor Blades and More. I bought a pack of 100 of GEM SE blades last week.
Around 1950 GEM and EverReady merged to become Personna, whose formal name is The American Safety Razor Company. I think they're the only blades made in the United States. Evidently, Personna has decided that retaining the GEM trade name for the blades is advantageous for them.
