Ski Boat Stringers

I'm writing this for my own benefit, as we are hoping (for me, hoping desperately) to get a ski boat, and it's important that older boats have their floor supports made from fiberglass instead of wood (because wood rots over time, and replacing it is expensive). This is the best information I could find:

Year When Started Using Fiberglass

Mastercraft: 1983
Ski Supreme: 1987
Supra: 1992
Ski Nautique: 1993
Malibu: 1995 (Echelon was 1993)