I have a choice of web suitable for vehicle straps, including cotton, nylon and polypropylene. I also have fittings to match available in the shop section of this site. Web straps are available in a wide choice of colours, though I don't carry them all in stock. Most are available in 1 inch widths, and cotton web has a choice of sizes.
I am in the process of constructing this page and will add more details in due course. Please contact me if you require web straps.