I was at balcatta recycling depot this morning, and near the shed where they recycle old paint was a sail bag-over 20' long, containing a hang glider.

The bag looks a bit shabby- but when I opened it up the stuff inside looked in pretty good nick [apart from 1 slightly bent strut thingo]

From what I understand though- the main spars in these hang gliders are the right specification for land yacht masts.

first in gets the Ally mast!
just make sure you have a vehicle long enought to transport it!

stephen.