Need a Design for 4 18" Omegas

[One Bad MOFO]

I need a design for my Omegas, 4 18's going in an explorer and I don't want to do a wall.
Max dimensions are 40" wide, 25" tall, 54" deep. Since it's going in an suv, I'd assume subs up port back would work the best, but if not, I can add 6" to the depth.
I'm thinking double layered mdf for the entire box and tuned to 30hz.
Anybody wanna come up with a design for me?
I'll paypal somebody for the design I use.

[46panel]

I'm not an expert but I just did a rough little paint sketch up. All outer layers doubled up with .75 wood. 203 inches of port area, length of port is 18" tuned to right around 29.8 with a total of 20.8 cubic feet inside.