If you give the fibreglass factory in South Aus a call they will be able to help you here is the link, they made your boat and are still making cats, if you need any repairs they are spot on.
Boat & Yacht Builders & Repairers - Lonsdale, SA
The Repair Specialists
208 Dyson Rd, Lonsdale SA 5160
Phone (08) 8326 0877