Hmmmm...a dacron/mylar laminate sail on a 6.0? That must be some sort of custom sail someone had made for the boat. That type of material is not known for it's durability although it is pretty cost effective. Once they start coming apart, replacement is pretty much the only option.

You really can't beat the value and durability in pentex fabric. It's a mylar laminate on both sides with bunches of pentex threads (scrim) running in the middle of the sandwich. You can have a custom main sail made for somewhere around $1200 or purchase a new factory sail for something around $1300. If you were to go with a basic dacron (white cloth) the price would be slightly lower.