Bro, I've been meaning to ask... How much have these fantastic commissions been? (and who does the best - preferably deep innie - navels?)
Fantastic work, either way.
Individual characters with detailed navels, I'd go with TychyTamara (about $25-$30 each) or Nindei (about $30-$40 each)
http://tychytamara.deviantart.com/
http://nindei.deviantart.com/
For groups of two or three I'd go with Avionetca (about $60-$65)
http://avionetca.deviantart.com/