If you want a quality canvas/fabric top for yor trailer get a snocap, here's a link to thier website
http://www.snocapstrailer.com
1300.00 for a top that accomodates fold down salt shields/ramps on a 2-place, 10ft V-nose. Just to give you an idea, if you have ever been around a fabric aircraft such as a Piper Cub etc... the material is as taught as that, however, it is MUCH more durable. The company calls it road armor they are located in Montrose, MN and they sell shippable kits. Check it out... if you were ready to spend $1000 for what amounts to a glorified tarp flapping in the wind dont... spend the extra couple hundred and get this, plus it has a 5 year warranty!