For sake of completeness:
http://www.behotec.com/Behoteccom.html
http://www.pstna.com/
http://www.mooresturbines.com/
http://www.tjt.bz/
http://www.skypipe.de/index.php?site=turbinen
http://www.swbturbines.com/model_turbines.htm
http://www.bairdtech.com/
http://www.jetjoe.com/main.php
http://www.jdenterprise.net/PriceLst/PriceLst.htm
http://www.jetlucky.com/main.php
..and there is one more new one just coming out of developement in England, but I can't remember the name....