I found out about http://www.schtickers.com/ from Tamara Lackey and Lena Hyde who have them on their laptops of their children and family.  I absolutely adore this piece by Lord Frederic Leighton called Flaming June so instead of getting a custom image, I got this piece for now 🙂  Quality is awesome, shiny and smooth, and removable if you like to customize often.  My schticker came within 3-5 days!