Zoom - UF-01 Ultra Fuzz [schematic]
I think the original had a bunch of SMD components, and it was even still bigger than a 1590B. I can't promise it soon as I have a few other things on the list first, but I'm going to get a perf layout done, and try and condense it as I can. No promises, but I want one of these on my board too, so I'll make something happen eventually...