on the cheap side, you can use DOD flashback fuzz. that's the one im using
although it really depends what kind of fuzz you want. some like the lo-fi sound, some like a crispier fuzz. try www.musiciansfriend.com's soundclips to help you decide
BYOC Ultimate Fuzz, Dunlop Fuzzface, Analogman Sunface, Boss Fuzz, EHX Big Muff, MI Audio Neo Fuzz, etcccc. Which type you like? Germainium or Silicon Fuzz? Germainium Is vintage type, Silicon is Modern type.