Had a couple of days in Sydney on business and thought I would check out the first Aussie Kinokuniya on George Street specifically to look at Apica.
They have some but not a big range. CD15 at $4.40, and a few others not in the CD series. You have to look hard and turn many over to see if they are Apica - do so and you will find some gems. There is one called 3150 which look like they are a copy of Aussie Rules footy jumpers. Same size as CD15 and same price. There were a few others in A4 and A5 in "pretty" covers and a selection of Maruman and Campus, although not many. I get the feeling the range would change all the time so you probably have to wander in from time to time.
I was a little surprised they didn't have much in A5 and smaller.
There is also a range of loose leaf in colours and white (not Apica or Campus) and binders to suit (23 hole like most similar) but seemed typical quality Japanese paper, and a big range of stationery items.
Worth a wander through if you are in Sydney.