Need to find diet sunkist orange crush pub squash in cans?!

Need to find diet sunkist orange crush pub squash in cans?

I shop for some elderly people who live in assisted living hostels. one of them is a diabetic and he loves the above drinks. I used to beable to get them in cans but lately the all i can get are 2 or 1.25 litre bottles which is a waste as the fizz goes before he can finish the bottle He is on an aged pension so i try to get them when they are on special. I live in and around Gosford area NSW. I would appreciate any suggestion as I have visited nearly every supermarket Big W and Kmart up here. I will go to Hornsby or Newcastle if availabe there. Thanks