I have purchased from a number of US sources with no problems at all...
For watersports stuff...
http://www.bustersmarine.com/ - Saved a heap on a Super Mable Airhead tube I bought on sale this time last year... great service, prompt delivery. Freight cost more than the tube, but still heaps cheaper than buying locally.
Could also try
http://www.bartswatersports.com - somehow have them on my Favourites, but cant recall using them..
For other boating 'stuff' I have used:
http://www.overtons.com - miscellaneous boat bits I could not find locally.
http://www.getaprop.com - bought spare props - great price on genuine Volvo Penta props
http://www.fishonmarine.com - bought ICOM VHF radio from them. They specialise in the Oz market.
http://www.winnisquammarine.com - for genuine FW parts and spares at realistic prices - Ryan - make sure you tell him you came from the iFourWinns web site and he'll really look after you.
Us guys in Oz should get together an create a known list of good suppliers of boating bits both locally and OS...
