Jake,
I have the receipt from SMS indicating the following cloth colors and numbers- the fabric design is the same for all;
2450 Fawn definitely the most common, and what I ordered.
2449 Blue
2448 Aqua
3421 Green
Also silver vinyl, and white vinyl, but no numbers. They do reproduce the vinyl, it is not OEM as the fabrics are.
http://www.smsautofabrics.com/
They were quite helpful on the phone, and can send you out samples of what you express an interest in.
Two more pics of a redone middle seat bench that is out of the truck.
Good luck !