Gizmo has a cool outlet I use too
http://www.gizmomotors.com/index.php...st-pipe-detail
Pipe of alum tube and silicone hose and you can fab your own pretty cheap
Bonzi and you can fab own as well if you want color
http://www.bonzisports.com/store/bon...ust-p-131.html
Both Gizmos and Bonzis are big enough ID to run extension pipe through