Most of the faces from 2k11 were made by koreshNik and he does not really visit the forums that often anymore, I pretty sure he'd be okay with us using his works as long as we credit him.
you could at least try, or ask the college hoops team as well, or jaosming (i think he was part of the team in 2k11) ..im not really comfortable were only 'assuming' that its ok w/ koreshNik
i found this list very helpful in deciding w/c rookies to use
http://nbadraft.net/2012-early-entry-list