Graham, this ebay seller
http://stores.ebay.com.au/Marsol-Ind...id=p4340.l2563 has panels and kits at good prices, solar capacity and prices have plummeted and places like Jaycar are way behind the curve. If solar is going to be your only charging option try to size your panel such that you are charging at the maximum allowable rate for the battery, otherwise leaving the battery in a semi discharged state could result in a sulphated battery.