Another great sounding fuzz provided by Björn Juhl of BJFE which is sold as DIY kits through Moody Sounds. This one is based on Tonebender Mk.II with a quite few addons.
Here is the biuld doc including schematic.
Sphere80 beat me to it again and verified it a few days ago using those big USSR GT404 transistors which appearantly sounds really good in there. Other leaky NPN germaniums should work as well.