Post extender / Refillable Pages question

[DaisyGirlAllTheWay]

Hi Everyone!!

Brand new to scrapbooking...

I was trying to perform a search on this subjuect but the search seems to be down for a couple days...

My question is, where do you guys get the post extenders for the disney 12x12's online?? I've saw a couple but I'm not sure if they would work with the disney scrapbooks??

Also do ANY refillable pages work? When I found some on ebay it looked as if the punch holes aligned to the scarpbook I have but I just don't wanna buy based on looks?

TIA!!