I went through an exhaustive search a few months ago with no luck. Raymarine is of absolutely no help, they claim to have no more belts and the solution is to buy a new autopilot. The best alternative I could find was to have a belt fashioned from polyurethane with a Kevlar core (the original belt is poly w/steel core). There are a number of companies that will make these custom belts. Good luck, and a pox on Raymarine!
If you do find a place to order or make a belt, you have to know the specifics about the belt. Mine, off an Autohelm 4000, was an AT9-765. "AT" indicates the shape of the tooth profile, "9" indicates 9mm wide, and "765" indicates a circumference of 765 mm. Good luck, I hope you find one.
Last edited by kvaavik; 07-21-2008 at 08:41 PM.