I have the steel one from Harbor Freight and its usually $49. Its held up well, and I added turn lights and a semi-waterproof bag, also from HF.
MOTHER SHIP Winnebago View 24H (2007 Dodge Sprinter 3500 Chassis, 2008 Body)3.0 L M-B Diesel V6 bought used with 24K miles. Toad: ROCKY the Flying Squirrel.