I found these rugs on craigs list. They are all hand painted with acrylic craft paints and then coated with polyurethane and made of outdoor canvas. I bought all of the modern ones, but the artist, Andrea Neill, said can also make custom ones. I really like how flat they lie, and they are solid enough that the corners don't turn up.
The two modern rugs were inspired by rug ads in a magazine. The circles rug was inspired by the Partridge Family bus. Andi can paint pretty much anything on them in any size you want, so contact her via the craigs list posting or through her website below. There are a few discounted rugs left on craigs list now, but she'll be painting more in Feb or Mar.
Andi's website doesn't have any of the dollhouse rugs, but does have cool painted furniture (not miniatures) and fun baby stuff.
(All images by Andrea Neill posted on craigs list.)