I believe their costumes are custom made. I've looked around the net and didn't see any suits of their caliber. Well, aside from a few chemical suits, but don't expect any variety of colors. On top of that, they can be very expensive. If you're not looking for the same plastic shine their suits have, then that certainly widens your options. There are costume sites that sell prison jumpsuits, NASA jumpsuits, and Michael Myers jumpsuits which, with a little work, could be made into a Heckle/Twitch-esk outfit. Hot Topic has a variety of striped clothes that you could use for the sleeves and shins. They even have metal spiked attire; shoes, wristbands, etc. Imosh.com has this too, but they also sell spikes individually and of different sizes. They also have some menacing gauntlets.