Read that EasyShift is great for E153's. Called up Caltex welshpool, high wycombe and kewdale and none of them would sell to me without a business account and in less quantities than 20L. As you are all well aware the E153 needs around 4L.
 
Any people I should be talking to/places I should be going?

I dont think you can get it in less than 20l.

Speak to wtfauto, they used to use it, but i think they use a motul fluid now.

 
Bought 2 x 4 litres Easy Shift 75W-90 for $103 14/05/14 at Caltex South East Hampton Park Vic Ph 03 9799 0111
Item code 1418244
Brought 2 because I knew it isn't going to get any easier to buy in the future.
Call them and they may know someone in Perth or they may post?