Last Thursday when I was making enquiries about this with my closest Mits. spares outlet - Albion Park NSW(and also Nowra NSW), I was told SPIII was on back order and it is made by Castrol.
I called again today and was guaranteed that the shipment will be arriving tomorrow Friday AM.
It will be the "genuine" product in the Mitsubishi bottle - not a Castrol branded product.
Price increase - established by him calling up the part # on the computer - thereby confirming that it is not "NLA" or "nil stock" - to $41.70 for 5 litres trade price.
This is up from $38 I paid mid last year for my last purchase of 5 litres.
Laqst week I also called a Hyundai dealer for their price for SPIII, and did not take it any further once I got a tentative indication of it's outrageous price, as indicated by "Madna 3.5" in post # 18.

