Here's one at BCF (boating Camping Fishing)
http://www.bcf.com.au/online-store/p...81#Description
They also have Battery boxes to put them in ranging from
http://www.bcf.com.au/online-store/p...29#Description
to the really fancy
http://www.bcf.com.au/online-store/p...15#Description
All up easy to use and not too much of an outlay.