Steamrollers are the shit. Though since it is just a simple 'pipe' shape it can be hard to find a nice artistic peice. Mines like 7-8 inches long and all it really has are marbles on it, some swirls goin the full length and some awsome colors.
Legal Highs, Glass Bongs, Pipes Head Shop

Thats really the only place I know of. GL searchin cause Steam's are awsome.