I made a pair of full-length poles out of carbon golf club shafts which I got from the bargain bin at the local golf emporium. Epoxy the Leki tips on one end and use bike-handlebar-tape for the tops.
Total cost, about 35 bucks. They weigh so little I haven't even bothered to weigh them.
Of course given the application durability may trump weight. Hard to say how long they'll stand up, but I've pushed on them enough to satisfy myself that they're not going anywhere.