Just any old manifold? I might know where there's a dusty system made of old leaded glass and glass stopcocks. I would expect it wouldn't be worth your while; the vacuum gauge is butyl phthylate, the stopcocks need greasing, but I'm pretty sure one of them is broken and they sure aren't cheap these days. Pyrex greaseless stopcocks cost lots less, but then you're stuck finding someone to assemble it. There's a guy out in the Carolinas who makes them custom--way spendy. I'm not sure if anyone else has responded to this request, but feel free to clarify: how many kinds of gas (probably 2, right? red and blue?) and what kind of cylinders or flasks, openings needed for blow hose, electronic vacuum guage, main pump? Grounding electrode? Horizontal or vertical?
Neal