Excellent, thanks for the replies everyone
I'm tempted to go for the 2W or maybe even 5W waterproof Jaycar ones (baed on the potential for use in general hiking/camping) but price starts going up, so might check out Cash Converters as Peter suggested. Haven't been in to a Cash Converters since 1990's when once upon a time all I could afford was old 2nd hand lenses from there!
http://www.jaycar.com.au/productView...UBCATID=1048#6
http://www.jaycar.com.au/productView...UBCATID=1048#6