Dollhouse-Oriented
Vendors

Dollhouse
Miniature Printables - Offers patterns for printable miniatures
(not unlike the cardstock miniaturies patterns elsewhere on the Heroix
web site) as well as printable dollhouse wallpapers, rugs, and so on.
Remember to work in 1/4" scale.

Dollhouse-Miniatures.com
1/4" scale catalog - By no means the best online catalog
in the world, but they do have flooring papers and wallpapers. You might
even find the online JPEG previews as useful as the physical papers.

Jim's
Printable Minis - Offers patterns for printable miniatures
(not unlike the cardstock miniaturies patterns elsewhere on the Heroix
web site) as well as printable dollhouse wallpapers, rugs, and so on.
This link leads to the 1/4" scale page, but you could also use the
1/2" or 1" scale miniatures simply by reducing them to 50% (1/2"
scale) or 25% (1" scale) of their original size.

Miniatures.com
- Has shopping functions as well as information. Features a free online
book, Everything
You Wanted to Know about Dollhouses but Didn't Know Who to Ask,
which has some good tips on building scale buildings.

Search
eBay for "dollhouse miniature scale" - Remember
that you are looking for 1/4" scale items.