seat

I'm looking to install a pedestal seat for the port side of boat. The owner had sent the back to back seats out for reupholstering and never got them back. I like that the back is so open and will keep it that way but need another seat for a passenger. The question is I saw somewhere, either...

The plastic slides on my Captain seat (1995 Islander 26.8) are shot. Does anyone know where I can get replacements? I order a hardware kit from Todd (Gloucester Captain seat). It "looked" right but there were no dimensions for the slides so it was hard to tell. Anyway the slides are 3/4 inch...