This is what I have so far. The two round holes at the top are for bolts to hold the two sheets together. You can make it pretty by using chrome cap nuts in the front. I don't know how they are held together down in the slot. I think you will have to handle that part. For both sheets to fit in the slot, one will have to be 1/8 inch thick. That should not be a problem.
I threw an image of a random arcade flyer so you could get an idea of the proportions.
The Aero City title will be etched into the back of the front acrylic sheet. It should light up nicely.
I didn't include any of the framing stripes yet. If you want them I can do it. My graphic design skills are rudimentary at best.
Let me know how all of this looks. I am headed to Florida on vacation on Tuesday. If you let me know soon I can probably ship it out before I leave. Otherwise it will have to wait until after the 15th when I get back home.