I started out by purchasing this homespun moroccan rug from Rugs USA. The largest it came in was 8x10. It comes in a zillion colors and is a GREAT deal for a wool rug. I was thrilled with the quality- it looks much more expensive than it is- I'd highly recommend it.
This is a horrible pic (and the rug pad I'd gotten was too big and needed to be cut down) but when I put it down, I just had that nagging feeling it was too small (especially width-wise). But it's really hard to find rugs bigger than 8x10 online.
Then MoS Charlotte gave me the great idea to go to a carpet store and see what they had by way of remnants. So I checked out Carpet Palace in downtown Bethesda (Maryland) and came home with some awesome samples. Their stuff is GORGEOUS!!! Truly, I never knew I could get so jazzed over carpet.
Oh, and the moroccan trellis rug got relocated to my sunroom (and fits perfectly), so all's well that ends well!