EDIT: Its an 8 inch fan not 10 inch as I mentioned, sorry for the confusion.
Well after looking at several options, I managed to fit a $70 fan from CheapaAuto, I later saw much the same fan in SuperCheap Auto for $65.
I did find an ebay bunch in america selling the porsche blower motor which looked identical to the original motor for about $100US delivered to Australia but I figured the original one had died and wanted a cheaper option.
I used the $10 set of plastic bolts mounting method as I needed to fit it in just right, you will see on the photos the original holes I made to fit the fan and found it didn't quite fit in the round top cutout between the frame rails.
The fan had a moulded plastic bracket on the surround that took some supplied fitting to give mountings further out, these had to be taken off with an angle grinder to clear the top cutout as well. Rubber washers are supplied with the mounting kit .. these are needed between the fan and the radiator or the fan will just interfere.
The lower plastic washers had the edges sliced off to fit.
I changed the plug on the bike on the bike to suit the radiator, $5 plug/socket from supercheap was exactly the right type.
Next mod is to add some electronics to turn the fan on for a few seconds when the ignition is turned on to keep the motor happy.
[Blockierte Grafik: http://i794.photobucket.com/albums/yy227/stonemull/whirlpool/f579de75.jpg]
[Blockierte Grafik: http://i794.photobucket.com/albums/yy227/stonemull/whirlpool/622cecae.jpg]