Art Supplies.co.uk Liquitex Flow-Aid Flow Enhacer and Liquitex Fluid Matte Medium (as well as other paints http://www.artsupplies.co.uk/

Cheap Joe's more art supplies http://www.cheapjoes.com/

DHS Mr. Super Clear http://www.doll-hobby.com/prodinfo.asp?number=B514&variation=&aitem=1&mitem=22

Daniel Smith Pricier but extremely reputable. http://danielsmith.com/

Dick Blick tons of art supplies http://www.dickblick.com/

http://www.modidoll.com/ -Has loose wig hair, sculpty-type stuff, paints, tools etc.