Your layout tag will have a model, such as 5E3 (sounds like a tube #, but it's not), which is the number to use to select a schematic.
If it's been in the shed or otherwise unused for a couple years or more, I'd recommend a slow, Variac start-up to reform the electrolytic caps.
For your 100W Man, you've got 2 options; find out if he's using a master volume model, and, if so, show him how to get the tone he wants at the pre, and turn the master down, or.....if all else fails, insert a quality AC controller in his line V. supply, and brown him down to 90-100VAC or so..... won't hurt a thing. The rest of the band will likely cooperate, too.......
(Edit: my latter suggestion was a poor attempt at humor, do NOT mess with a musicians' power source!)
For the cab, why not clone the real thing? Dimensions, pictures, schematics, and details for most models are at the site I linked to earlier. Naturally, they also sell tolex, cloth, pts, etc.