Convertible Pants with liner??

[Smooth03]

I'm looking for some convertible pants that are swimsuit material (fast drying) and have a liner included so I hike sans underwear. I've been using the Columbia High Performance Fishing Gear (includes a liner) but need to replace them. Anyone know of some convertible pants that include a liner? Can't seem to find them anywhere in gear stores and online descriptions don't include whether or not liners are included.

[Moose2001]

Outdoor Research makes a pair. Can't recall the model name. Look them up in either Campmor or REI. Both sites have good descriptions that will tell you if they have a liner.