So I downloaded VCB's release of Dragon Maid S to find these scans from the Blu-ray. Unfortunately there's a crease in between that's in the way, reverse searched and only found this grainy product image with the full artwork for Elma in the kitchen. No avail for the one with Kanan in the classroom, yet again a 2 split like the Blu-ray scans with the missing middle section.

Also checked on e-hentai, some other torrents on Nyaa.si, searching official_art on Gelbooru, Sankaku Complex and Zerochan.

Admittedly just interested in the one's I showed, but don't mind a complete collection of all 5 artworks.