Playing card sleeves?

i finally received my crowdfunded copy of Earthborne Rangers, which due to its environmentally friendly goal, made all their cards without the plastic core cards usually have in order to spare the environment. they're all floppy and fragile, so they definitely need sleeves. only... there's around 1300 cards.

buying cheap card sleeves from china would run me around €16 plus import duty, but all the ones i can find in local stores are like €5 for 100... that's a lot of money. and i don't even know where those are produced.

so, any recommendations on where to get sleeves? preferably with some rigidity if that's a thing that exists? i think the cards are like 88x63mm.

Edit:

Turns out Arcane Tinmen, from Denmark, make some of their sleeves in-house! so Dragonshield sleeves are indeed european, except the really cheap ones.