I just heard back from 3d.sk on their license agreement for use of content.

Commercial or hobby use is permitted as long as the original material is altered enough to keep it from being extracted.

Here are links to both licenses in case you need them...
http://www.3d.sk/hobby-terms

and 
http://www.3d.sk/commercial-terms

I hope this helps clarify the question of may we or may we not use them for Antonia free items. :)

Let me introduce you to my multiple personalities. :)
     BluEcho...Faery_Light...Faery_Souls.