The Chinese printer at Soul Draw (http://www.souldraw.com) is a cost effective alternative.
I've used the Banner Sign Vinyl Sticker material for my latest side art. It cost me $30 vs. the ~$100 it would cost from GOG. That being said, there is no substitute for the quality of GOG and I used them for my CPO and Marquee on the same machine.
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=103207.0;attach=270986)
For the price it's almost worth it just to give them a try.