Hill Brothers Studios, Inc.
   Offers video plans to help build a mini halfpipe.
   http://www.easyhalfpipe.com/

RampHelp
   Sells blueprint instructions to build ramps, as well as completed models.
   http://www.ramphelp.com

RampSodia
   Offering plans to build a variety of models.
   http://rampsodia.com

SkateProducts
   Grinding rail systems, kicker ramps, and ollie jumps for skateboarding, in-line skating and BMX.
   http://www.skateproducts.net

Skatoramps
   Sells step by step plans to build a variety of ramp models. [Best viewed in IE, may cause errors in other browsers.]
   http://www.skatoramps.com

SteelSun, Inc.
   Specializing in ramps, grind rails, fun boxes and quarter pipes.
   http://skateboardrampsandrails.com

Universal Industrial Products
   Features pre-assembled skateboard ramps, grind rails, kits, ramp plans and videos, and related accessories.
   http://www.ramps.com