You could just get a wide one. They’re actually pretty decent.

www.amazon.com/FujiFilm-Instax-Wide-Photo-Album/dp/B01GFQRB7W

This is the best quality one that’s actually made for Instax Wide imo. It’s officially licensed by instax and unlike the other dollar-store quality offerings on Amazon this one actually feels sturdy in the hand and worth the money. There is someone on Etsy reselling these for $50, don’t get it from there get it from Amazon.

https://www.amazon.com/FujiFilm-Instax-Wide-Photo-Album/dp/B01GFQRB7W