All art can be any type as long as its cleaned up. It doesn't have to be vector graphics. No one seems interested in the Miss World glass, only did one as test which looks awesome. There will be other glass projects, but some aren't for sale, ie. Paragon, Centaur 2, & some Williams & others.
So if you can scan & clean up the image, just about anything can be done. Still waiting on a license deal with Gene, Illinois Pin Ball. If that happens all early Bally/Williams glass stuff will open up.

Hi John - I have followed your progress with interest and I commend you on your perseverance. There are plenty of machines out there missing backglasses that can benefit from your work.

I have a Galaxy Backglass that I've just sealed. Would it be of assistance if I send you Hi Res pictures ?

How about an intro post to let people know what you have successfully done ;

http://aussiepinball.com/index.php?board=2.0