I can't think of anything that will substitute for a tripod without having three legs. No free lunch.
What I would love to see is a single telescoping leg with a ball head and two swiveling clamps that will turn your trekking poles into a tripod. THAT would be a hiking photographer's dream– you are hauling two perfectly good legs already. I could see it turned out in the 12oz range without much trouble.
You could also cut two legs from an UL tripod, leaving enough to strap/clamp to your trekking poles.
Voila! Using re-usable zip ties. 11.5oz and a $3.95 thrift store Sakar tripod. I could squeeze a little more by working on the handle and the center column. I would love to see clamps that would go to the metal pole and be more secure.




After some thought, a coordinated system could use a pair of flick-lock pole lower sections and a fairly standard tripod arrangement, with two stub legs sized to take the trekking pole parts and a full third leg would be included with the tripod, made by the same manufacturer as the trekking poles. With a 3/8" or 1/4" stud, regular tripod accessories could be added. The two lower sections on my Black Diamond Trail poles would provide 36" legs.
This would be so simple for someone like BD, Leki or Komperdell to turn out. I could see outdoor photographers dropping major dollars on a setup like that.
Another way to go about it would be to have sockets in the handles of the trekking poles to accept the stub legs on the tripod. That would avoid the need to disassemble your poles— just plug them in with some sort of ball catch/detent.