reservoir?

I have a question. I am replacing the master cylinder on my 67 power wagon. I am also replacing one on my 67 dart. Are they the same and where is the best place to get new ones? at an affordable price? any suggestions or obvious upgrades to do while the fenders and all eqipment are off of the truck????

Also, the other item,? I am guessing its the fluid for the hydraulic clutch? Do you usually replace those and if so, with what? It currently works. And if I keep it, whats the best way to semi restore it?