Beef Eye Fillet - wife just got back from Harris Farm with this beauty! Checked online and it looks like its available in NSW/ACT, currently ~$43/kg at Coles.
This product is a variable weight product, so the relevant quote is the $/kg price:
When you buy, you will pay for the heaviest weight quoted for this product.
Harris farm will select the product in store, will weigh it and refund you for the difference between the weight paid and the actual weight received.
We took advantage of the last deal they did on these and they delivered in a Styrofoam box with dry ice packets :)