Don't think the 75 Soft doors used any different weatherstripping than earlier years¹¹. Spector Off Road still shows aftermarket door weatherstripping. Shows as a discontinued part but still available. Not.sure anyome else has them. A guy in Oregon did a run of vent window weatherstripping. Believe he went by cruiser luzer or some think like that on mud.
Bought first FST in 1994. Weatherstripping was still available from Toyota cheap. It was sold the same way SOR does. One long piece you trim to fit.