My '97 has dual sliders. I had thought that the dual slider switched to the single slider in '98 when they redesigned the interior?You can pick up the window urethane from just about any body shop supply store. It'll come in a tube that'll fit in a caulking gun.
One other thing...don't let the junk yard tell you this one or that won't work. They are interchangeable as a unit from 94-01. The difference being 94 to 96 has two sliders that meet in the middle. 96-01 has a single slider.
I might be a little off on the year, but the footprint is the same if you pull the whole thing and aren't looking to just replace one pane.