I’ve found versions attributed to Introberto, but it seems their Facebook page no longer exists. I did find someone by the name of Inthasapen that has posted a bunch of art like this (and with Introberto attribution), so I think they might be the artist? Link to this image is here: www.facebook.com/photo/?fbid=184097660804274.

Please correct me though, as some images have Ron and INT signature and it is more than a little confusing to me.