Hi peter, sorry for the delay in replying - I've been away on holiday for a couple of weeks.
I had
originally posted that I used PrintFile Safe-T-Binders. These "binders" are actually a combination of box and album: they are folders with rigid walls on three sides with the fourth wall hinged to allow it to open flat. The rigidity allows you to stack them on top of each other floor to ceiling (if you've a mind to do so) without putting the squeeze on the bottom layers. It's squeezing that causes most of the "2x2-in-album stickification" you sometimes encounter.
The good news is, I finally worked up an order from them for eight boxes, not long after making those posts. The bad news is, they work too well, and I now could use a couple more.

As for your specific question: yes,
this item does indeed resemble the box-folder in question. At 5cm they're a shade thinner, and I can't make out from the pics how they seal up, but I'd reckon they're good enough for the purpose.
The album page looks more or less the same, too, but again, it's a brand I'm not personally familiar with. I have in the past bought some slide album pages which, though made of good quality plastic, were too thin to support the weight of coin-filled 2x2s. But being the same brand as the albums, if you buy them both together, at least you've got a good chance the pages will fit in the album properly.
My recommendation: try 'em and see.

Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis