Since USAKILTS and Stillwater have already been mentioned, SportKIlts is another option.http://www.sportkilt.com/index.cfm
You should also read Riverkilts comparison of SportKilts and USAKilts:
http://www.xmarksthescot.com/forum/s...ad.php?t=17439

Renegade Kilts is another.
http://www.renegadekilts.com/index.html

Freedom Kilts- http://www.freedomkilts.com/