John:
Going to a company will be expensive. First try these:
1. for window signs there are two methods I use - I will print the sign on vellum (I have even tried it on clear plastic) and use the vellum as the window pain. this technique is great for text only signs. I have also printed decals and attached them to clear plastic. for below all the window treatments you see are printed vellum. The exterior sign is card stock on white plastic.
2. for exterior signs there are a whole number of processes. The one I have standardized on is to print the sign on heavy paper (card stock). I cut it out, glue (white glue) to either black plastic (roughened) or black conservation board. Once cut you have a good stiff exterior sign. You can actually use any color backboard you want.
Back of sign - conservation board
Front of sign - printed card stock
Joe
