Reverse image search suggests they’re by Dann Matthews.
link to a Flickr album of more “icky mouse” images:
https://www.flickr.com/photos/41545641@N02/albums/72157627109956598
This old Super Punch post says he put at least one of them up as a candidate for a Threadless shirt:
http://www.superpunch.net/2011/07/predator-mickey-tinman-link-portal-link.html
