Zuber,
Yes give the guys a call. I too am in the process of putting together my own custom flatbed. Marty and Jeff have answered a great many questions already. Always, in a kind and considerate manner.
I put a deposit on my custom bed this morning, and talked with Marty about driving down and meeting with them to go over my drawings.
Funny, my bed is 7x9 also. Good luck with your project.