Mobile billboard signs

I own a mobile billboard manufacturing company called Superior Mobile Billboards & Advertising. I am wanting to improve my signage installation to the sides of my trucks. I am wondering if anyone can help me with my idea of using an extruded aluminum tracking that is basically a flat piece of aluminum that gets fastened to each side, and the bottom of the area for which the sign will be installed. The top rail for the sign installation will be a small tubular extruded aluminum. Both the sides and the bottom rail will be a aluminum track where you can insert another extruded aluminum piece that will secure the sign.

Does anyone have any ideas, or suggestions which extruded aluminum company can assist me with developing this idea, and providing me with it.

My web site is www.superiormobileadvertising.com click through all the pages

I can be emailed at darrinshortridge@aol.com

Thank you