Available on Redbubble, Neatoshop, Designbyhumans, Teepublic:
http://www.redbubble.com/people/edwoody/portfolio
http://www.neatoshop.com/artist/Edwoody 
http://www.designbyhumans.com/shop/edwoody/
https://www.teepublic.com/user/Edwoody