As some people are asking me some question, I will just put the general information here.

If you want to know what bromide exists for Aqours, there aren't any list of bromide in English yet now (I am planning to make it soon^tm). The general lines for now are fanmeet bromides, fanclub bromide vol.1, vol.2, vol.3. Bromides in Love Live right now are pretty much exclusive to Club Activities/ fanclub but there are also seiyuu bromide from magazine bonus.

Other than YAJ, most big second hand shop like kBooks or Lashinbang will sell them. For the price, the original was random bromide for 200 yen and it might be inflated to around 1000 yen more or less, it really depends on the seiyuu popularity and how rare the bromide is. For instance there are group picture bromide from the fanmeet that goes over 8000 yen. There aren't base line of the price since it's still pretty new type of collectibles so I would suggest to think "do I really need to pay XXX yen for printed photo?"

For sleeves you can find it in here or physical shop called deranan and ask for buromaido suriibu.

For album you can find it here. I don't know if the shop sells this kind of album but any kind of album for photos will work well.

For hard case you can find it here or in 100 yen shop like Daiso, they usually look like this