I stock Express trailers. Smallest I have in stock is 16' at the moment, one is 7' wide, one is 8'. I can order anything you want. They build one of the best commercial duty trailers on the market: all tubular steel frame and chassis, Goodyear marathon radials, torsion (Dexter I believe) axles, one piece roof , 3/8: ext plywood interior siding, 3/4" ext. plywood fdecking, etc..
The 16's I stock are rear ramp door, 36" side door with a roof vent, and a 24" stone gaurd.
Shoot me an e-mail if you want, we can talk about ordering one for you...