Small update... I've been working on my marquee tonight and this is what I came up with. The original background is from Arcade Art under the Homebrew section. I basically fired up Photoshop, resized it to my marquee's dimensions, played with the levels and color balance to get it to be green (it was blue originally), and then added the text.

This is a REALLY small version of the marquee. It's real dimensions are 23.75 in. x 6.75 in. Since I had to mash it down so much, the text looks a little more blurry and shadowy than it really is.