>>12757 I did some decently extensive searching for it a year or two back. I found these, which seem to be from the same artist if nothing else, but no source.
>>14000 The first two are by plump-pine on DeviantArt.
The second two are by kurocaze-s on DeviantArt (@kurocazenosora on Twitter), but they're older and I think he took them off his accounts at some point? I got them from image archives.