Help finding page protectors for odd sized album

I recently purchased an adorable little themed photo album thinking I would just use it as a tiny scrapbook, it advertised as being made to hold 6x4 photos (landscape). As it was shrink wrapped I didn't see what kind of sleeves it had and just assumed they would be plain and that was very much a mistake. Instead it holds 7x5.25 sheets of paper with little thin plastic pockets to hold photos. Yes I am very bad at visually estimating size lol.

I know I can always just wing it and not use page protectors, or take on the very tedious task of making my own using the absurd amount of page protectors in other sizes I already own (seriously why do I own so many 12x12 pps??), but I would love it if I could find the right ones pre-made.

Help me peas, you're my only hope!

Here is the outside of the album


And the inside, the pages are pretty thin paper with a thin plastic pocket. True dimensions of the page are 7 1/8" wide x 5 1/4" tall