Thanks. We won't be leaving the slip too often, so I'm not overly concerned on docking difficulties (this is more home base to launch the ski boat). I called a place that sold sunbrella @ $26/yard, which is just too much.
I did see a pic somewhere of a boat that had a mesh-like cover on the rails. Worst case i figure that we find a material like that and do the sewing ourselves. have to figure out how to do snaps for the areas of entry, but i wouldn't think it would be too crazy of a project.