Hi I see you are in Australia, me too Im in Adelaide. South Australia and I had the same problem finding the feeds I was after but I eventually Did find game bird starter along with all of the other feeds and crumbles etc at Oliver's Stockfeeds/Pet shop. They are on Morphett Road, Glengowrie straight across from Morphettville race course. Best of all they sell all of the bird feeds by the Kilogram for example I bought one KG of gamebird starter to see if my birds would like it and it cost me $1.00 which was lucky because they started eating eat because it was new I think then for 2 days they wouldn't touch it so I went back to feeding them canary seed and I mixed about a quarter of the starter in with it. You can contact Oliver's stockfeeds which is known as One Of The Largest Pet & Fodder Stores In Australia by stopping in at the store at
88 Morphett Rd, Glengowrie SA 5044 you can also call them on (08) 83770223
They also do deliveries and sell birds, chickens and other pets.
In Addition also I will probably be crucified for saying this but my Quail love canary seed so that is what I mostly feed them I would rather feed them feed they love and eat than feed that gets kicked out dirtied on and not eaten. They all look great with shiny feathers and ready for the Adelaide royal show :)