I really like the Towtector (
http://www.towtector.com) too, that way I can use it with all the trailers I tow, from the 5th wheel to sled trailers. Again though, it seems awfully expensive to me for what you get.
In the end, I think I'll fab up a "Towtector" style one myself, I've got some nice aluminum square tube kicking around and access to cheap heavy truck mudflaps. I'll post some picks when I get it finished.
Waxy[/QUOTE]
There's a spot in Calgary where you can get the "towtector" style flaps:
http://www.fiberbuilt.com/contact.html, I think it was around $100 for strip brush 8' wide x 20" long.