Did you ever find someone for your windshield?
What are you meaning by a banner? Multi-color, half-tones, graphics, etc.? I cut sign vinyl for one of my daughter's truck windows. It's working well so for - simple and clean. She put them on the side and back windows. I don't know if there would could be legal ramifications about putting something on your windshield that could be construed as blocking your vision. Just a thought.I am looking to get a banner to put across the top of my windshield on my truck. Does anyone know of any good companies that do it online?