Why not make some beams from carbon/epoxy? It's not that difficult anymore with the availability of 12K biaxial carbon sleeve. If you only need round beams a piece of pipe will work as a mold. For teardrop beams a mold could be laid up on an existing beam. Either way, the layup and curing are not beyond the abilities of a reasonably competent amateur, provided you get some guidance from someone who has already done it. PM me and maybe we can get something going.
And I apologize if this topic and my reply has long since lost all relevance <img src="http://www.catsailor.com/forums/images/graemlins/tongue.gif" alt="" />