http://browse.minitokyo.net/gallery?tid=59427&index=3&page=1https://www.zerochan.net/Kekkai+Sensen%2COfficial+Art?q=Kekkai+Sensen+official+art&p=1These two are pretty good, but if you can’t find them there, try checking Nyaa or one of the booru sites with the official_art tag, like Sankaku Complex, Danbooru, or Gelbooru. If it’s still not there, your best bet might be just buying it. I couldn’t find your image, sadly, but maybe it’s part of a set that’s got more stuff you’re looking for.
