The International Society of Folk Harpers and Craftsmen has a magazine with ads from lots of Harpmakers. Also look for the Sylvia Woods Harp Center on the web - she sells several different "brands" and books, etc. My last issues of most of these are several years old, but a few gave email or web sites that MAY be current:

Triplet Harps tripharps@aol.com a popular make
Mountain Glen Harps mtglen@aol.com
Folk Mote Music - dealer, several makers www.folkmote.com
Dragonwhispers, where mine is from brtruitt@ix.netcom.com
I'll try to find some more recent info