Mojotone has a pretty large selection. Click on each color/style to see more options.... http://www.mojotone.com/amp-parts/tolex-tweed-colors
You also might look at fabric shops and automotive interior supply shops. Who says that you have to use tolex?
Good luck! Let us know how it goes. I've considered re-covering one of my amps and am interested to see how it turns out....
Are you saying the stuff from the automotive places is vinyl and not tolex?Look for tolex. The vinyl does not take to the adhesives like tolex does. It's more expensive but it works better with the adhesives. Anything less will stretch too much and will separate from the backing, and or bubble up and generally be a pain in the ass to work with. Plus tolex takes a hit better than vinyl from the fabric store. I make guitar cases and have been through a number of materials. Tolex. Upholstery fabric is not the same. Tolex was originally made for car tops and is much tougher than upholstery material.
You can get pretty much any type of 'designer' textile you'd like through Pallas Textiles (google them). The Xits stuff, the chilewich type stuff Morgan uses etc. However, most of it is VERY expensive compared to traditional tolex, on the order of $40 to $70 per yard. Also, much of the coolest-looking stuff is basically upholstery fabric, not a vinyl like tolex, so you have to be concerned with glue bleed as well has adhesion (I find it much easier to peel off). Also it will stain/tear quite easily compared to tolex.What about the cloth/material XITS amps uses? Does anyone know if that available anywhere?