they sell huggies (upto 5kg) in a bulk green box. there are 108 in the box. thats all i bought for my boys. i used to buy them from Action which is now IGA. they still promote them on the huggies website too. also have you tried BIG W ?
Thats the newborn size. Huggies also do an Infant size which is 4 to 8kg I think. Like someone else said, its an inbetween size so they are not made in the bulk boxes like you get at BIg W etc. But as Trish has said, some places do sell them in bulk. You just have to find who.