The Mast Company sells Aluminum Mast Sections
and Telescoping Poles.
Dwyer Aluminum Mast Co. will sell a 2" extrusion only
New windsurfer masts
cost a lot of money, fiberglass or carbon!
However, there are a few on Craig's List
. We'd probably need the taller ones... well over 500cm.
Maybe I can get to Delks in Asheboro and see what they have for mil-surplus aluminum poles.