Last week I purchased the Cricut “Green Polka Dot Cartridge Binder” direct from Cricut. Seeing as the inside of the binder is not shown on Cricut’s website, I thought that I would show you what it looks like here.
I originally thought that the binder held just 6 cartridges, but in fact it takes 12. Yipee! I can purchase more cartridges now! 
THANK YOU for posting this. This is the only place on the web I could find pics of the inside.