I think Hugh Horton's Bufflehead sailing canoe meets your spec.
Here Hugh is paddling two up

sailing off Cedar Key

Plans here
http://www.duckworksbbs.com/plans/bufflehead/index.htmWeb site for Swiss builder here
http://www.bootsbaugarage.ch/bufflehead_en.htmHere's Axel carrying Bufflehead on his shoulder

A simpler solution would be any two seater open canoe fitted with Solway Dory's lug rig and outriggers.
Loads on the Song of the Paddle sailing canoe forum here
http://www.songofthepaddle.co.uk/forum/showthread.php?28961-First-impressions-of-sailing-the-Solway-Dory-35-sq-ft-Expedition-Rig.
Hope this helps - your requirements can be met.
Brian