Originally the posters on the wall looked kind of plain, so I came up with the pattern on both sides of the frames to give the posters a sense of motion and sci-fi look. I just used some 1/2" MDF, routed the edges and covered it with a heavy black felt that I picked up at Hobby Lobby. I used picture rails to mount them on the wall.
For the sign, I found a free star wars font, by googling it. Then had a local sign shop make and paint the signs using a cheaper sign foam board. Turned out great. Still wasn't super cheap, I think it was about $275.