do you have a petsmart near by?.... you can find millet there... and also very nice treats... budgies also love fruits and veggies which you can give as a daily thing esp. veggies... fruits not that much as they may get watery poops......

here´s a pic of millet... they sell in in bags and in form of sprays


millet: click here
this is the one found at petsmart but you can buy any