Check out Pinterest, if you type in either sci-fi or space as a topic, you will eventually come across Tyler 's work. In some cases he is credited, but in a lot of the cases his work is being "sold" as something else, by someone else. Luckily on Pinterest you can see the site the piece was originally pinned from, and can trace it back (be prepared for a long and windy path though).
If I see a piece that has been stolen I leave a comment giving its true name, and who created it.