My opinion on game on graphics (formerly mamemarquees). Scott printed me an MK1 cpo a while back, the size way way off, he was very hesitant about replacing it for me as it was his mistake. Finally after exchanging around 10 or so emails he gave in and sent me a new one that was the proper size. It ended up peeling off in less than 2 months.
My next purchase from him was a UMK3 marquee, again the size was wrong, and again gave me a real hard time about exchanging it. Also, the colors were way too dark.
From my experience, and this is just my opinion, it is better to find the art work file and have a local shop do it for you.