I just used whats out there on Google and enhanced it in Photoshop.
I don't think anyone will go around with a magnifying glass inspecting your marquee and artwork, besides the odds are you would get a crap image when you print it anyway.

I asked Don Bluth for some permission and help with graphics with my "ever ongoing" sub mini bartop Dragon's Lair, and I got a nice reply from him saying he will ask Rick Dyer at DLLC.
Well that was 2 months ago and I'm still waiting.

Anyway better to rip and enhance unless you get lucky and snag a cheap repro on Ebay then just scale it down.