Mine looks pretty much exactly like that (minus the coloring, obviously), however, it's made from canvas, with leather piping, which would make it much more dye friendly (as well as give it the weight and look of the one in the movie). The only differences, as I mentioned, are the logo emblem, and the tape measure pouch. I'll get some good pics uploaded later tonight when I get a chance. If I get the spare coin (snerk), I'll see about getting a tape measure pouch added, in place of the second hammer holster (I've got some friends that do amazing things with leather). I'll also drop it in dye when I get the chance, and convert it properly.
I'm fairly sure the one in the film is either canvas or nylon, but I can't find any nylon pouches that look anywhere near the one in the film. The best part of the one I have, though, is it's readily available at Lowes, and is near perfect. Cost about $10.
Won't wear the outfit with the rainbow belt? Aw man. I actually kind of like it, funny enough.
By the way, for anyone wanting to go with the type of suit I've got, blue flightsuits are equal parts expensive and hard to find. I wouldn't recommend them, off hand, unless G&B happens to have your size on clearance. That's the only reasonably affordable option I was able to find, at about $80 shipped for the poly/cotton blend. After that, it was cheap polyester NASA costumes at $100+shipping a pop.