You guys should give Jeff Kent a shout. this sounds like a project that might be perfect for CSI.

Actualy come to think about it you could get Henry Bosset at North sails to build the sails for the spar and I bet it would be awesome.
Jeff is set up well for one off construction projects and their quality is awesome.

Jeff is a former Tornado Helmsman who won the tornado olympic trials with Henry the year the US Boycotted the Games.
Jeff also won the DN world Champs. Nice guy, good shop.

I am not in any way affiliated with Jeff, but I do own a couple of his masts.

http://www.csi-composites.com/

Eric