Tumblr, in terms of spanking content, is pretty much a mass of stolen images and copyright violations. Occasionally, the images actually reference who they were created by but more often that not that's either been airbrushed out, cropped out or simply not mentioned. Anyway, if you want to get in touch with Kindinov I'd take a look here...
http://spankingart.org/wiki/Kindinov...although you might need assistance from someone who speaks Russian.