Ou need to provide some more details as to what you want.
Are you going to use a docking station for power control?
What 'bells & whistles' are you looking for? GPS? WiFi? Celphone connectivity?
What about control? Powermate? Keypad? Touchscreen?
Maybe you just want the laptop mounted on a gooseneck or somethign so you can access it while driving. (Not the best solution as far as safety goes, BTW).
I'm in Dallas and can certainly help, but I'm not doing any custom fabrication because I suck at it. Althought here are others in the area that could. (Red, are you lsitening?)