I bought a Maruman Mnemosyne 182 for 4,65€ and this seems pretty fountain pen friendly, it only bleed through where I painted with the Fude nib.
I had a Maruman Croquis which has different paper which bleeds through more but I really like, and a Maruman P164 Reporter Pad which really bleeds through.
But I think the Mnemosyne seems to be a good alternative also for cheap, good quality paper.