I've been looking at the "pant" waders as well, just a bit less to stow when out on the water. Below are a few sites that I've been looking at lately for waders.
http://lovigkayakfishing.com/gear/drypants
http://www.twsport.cl/indumentaria-d...st-waders.html
http://www.hatchmag.com/articles/rev...-pants/7711572
And here is the 2013 Yellowstone shootout for wader of the year:
http://www.yellowstoneangler.com/gea...elas-bootfoots
There is a lot of data in the above study.