I'm looking for a sliding mechanism for my rafting seat. The frame my wife and I got is a good size for her but a little too small for me. We do have an adjustable foot bar but even at its longest, it's still too short for me. I've seen the seat sliders before that move the seat forwards and back but can't seem to find them online. Anyone out there know what I'm talking about and possibly know where to find one? Thanks!