Edit: Just a note up top. Let's use this to share artwork for new designs. Let's contribute and make stuff available for other pinsiders to use. This isn't just for Gottlieb games
I have a few old Gottlieb System 80b games. Custom artwork can really fix one of their biggest flaws, the translite. Some alt translites look good, but most are a paste up of crap found on the web.
There is a custom translite for Genesis that really inspired me. It used custom artwork and was pretty attractive. I managed to get a copy of the tiff to print it off, but I would love to find the original so I could change the text. There are a few different version of this artwork floating around. Ask and I'm sure someone will answer
Genesis Sample
Getting these printed locally can be difficult. I order them off of the web at http://www.printmoz.com/ (I found them, because Vid posted their link). Their backlit posters are nice and thick with dark colors and a glossy finish. I have also used these for video game marquees. Gottlieb translites are $30 and video game marquees are $15. I try and bundle stuff to keep shipping reasonable.
Minimum resolution needed is about 150 dpi. The Genesis translite is 25x20 inches.