Best transistors for fuzz

[oepsle]

First post here at DIYStompboxes. I'd like to try my hand at building a fuzz pedal, perhaps a Tonebender MKI or II. I have two fuzz pedals at present, a Langtronics Fuzz (hand built in England with AC128) and a Solid Gold FX Formula 69 (Montreal builder, silicon transistors). I have a friend who says he might have some old transistors and other components, and he's asked me for a list so he can check his parts bin. In my reading about fuzz pedals, I've come across a few that seem to be well regarded, like OC75, AC128, and a few others, but I thought I'd ask the Stompbox community for some ideas as to what are the best old transistors for fuzz. Any input would be appreciated.