Yvonne Gilbert - http://www.yvonnegilbert.com
She granted us permission to use her beautiful artwork, and as always make sure you insert full credit on all tags, tubes or anything you make. Her work is so cool & beautiful "AS IS", that you might want to use it without tubing, go take a look for youself! (Tubing allowed)
I emailed her for permission and this is what she replied:
"Hi Minnie
Please feel free to use my artwork for any non-profit making exercises,
Yvonne"