I've updated the Cards and Stamps from this Higurashi Mei Archive: https://ouo.io/hLteK2 as the original owner hasn't done it since October 2022. I hope he'll be back someday to update the rest.

I just downloaded the files from 4chan and sorted them (in my own personal way), as I still don't know how to extract zthe files from the game myself, which is something I'd like to learn, so any help is welcome!