Pic 3+5 are Skull9's, here's the site : http://sn.coffin-ash.net/index.html

I'm not really sure (don't have time to check for now), but #25 and #26 could be Rovel's, http://web1.nazca.co.jp/miso106/enter.html

#19 is Northern Light's, http://ss-nl.jugem.jp/

Actually there are 2 more pics (#9 and #15) that I know, but I can't remember from where for now, need to reorganize the links again. I'll let you know again when I've found the sources :)