You won't find vinyl with what is called "southwestern" appearance, or Mexican blanket appearance. You can find fabric with that appearance. The other alternative is the vertical or horizontal stripes, and stripes with patterns in them that would suggest a Mexican blanket motif. Here are some southwestern fabrics: CLICK HERE
I have never seen a fabric with the Mexican blanket motif by the yard.
That's not to say upholstery fabric like that doesn't exist.