Costuming:
Jewelry
Tribal Max: http://www.tribalmax.com/

Choli pattern
http://www.eagnet.com/edipage/areaserv/camdentor/cholipat.htm

Harem pants & cabaret skirt patterns
http://www.geocities.com/sheikhani_troupe/costume1.html

Directions for three tiered tribal spinning skirt: here

Oklahoma Dancers
Zenuba and Beledi Magic: http://www.geocities.com/Paris/Parc/8256/zenuba.html
Purple Roses of Cairo: http://www.shadia.com/
Desert Fire: http://www.aalimdanceworld.com/
Lilik and Company: http://www.lilikandcompany.net/
Gypsy Fire: http://www.tulsagypsyfire.us

Texas Dancers:
Tribal Evolution: http://www.tribalevolution.com/

Tribal Troupes Around the Country:
Fat Chance Belly Dance: http://www.fcbd.com/
Gypsy Caravan: http://www.gypsycaravan.us/gallery.htm
Domba (also sells costumes): http://www.domba.com/
Ultra Gypsy: http://www.ultragypsy.com
Read My Hips: http://www.readmyhips.com
Fringe Elements: http://www.fringeelements.com
Philadelphia Tribal Belly Dance: http://www.philadelphiatribalbellydance.com