1. to keep it simple, 2015 is not possible unless you're doing studio and 2006 has not been found yet. the custom 2006 in novetus is the closest you'll get to a 2006 novetus client for now
2. attempts have been made to add 2012-2014 to novetus in the past however most of these projects are dead or extremely inactive. your best bet would be to find a revival featuring those clients instead or patching your own