hiding the front license plate

[HiImBrian]

Well I have been driving around with my license plate in my window for a while now and I know I'm going to get pulled over sooner or later, and with my luck I wont get out of it. As a pre-mechanical engineer and a kid with a love for designing and mechanics, I am thinking about how I could design and make a device for my front license plate to slide up and down on. I have removed my worthless crash bar in the front and I have an excess amount of space right behind the front bumper above the intercooler. I have also had the idea of possibly mass producing this device to sell. Has anybody seen or thought of any possible design that could give me a start to this small project? Any help or advice would be much appreciated. Thanks
-brian