Ford Trucks: Discussions

I have a jacked up 2000 Ford Excursion. The vehicle was rolled and I am parting some of it out. The Drive train is off limits as I am converting it into a mud racer. I have the top and the doors off. If you need any of these parts, let me know. I am also selling some of the other interior parts.

I need to go one of 2 directions. I am thinking about finding a cab from a ford pickup of the same body style to match the front clip. If I can find this for a reasonable price, the rest of the excursion parts that I don't need for the conversion would be available. Does anyone know of a place I could get a cab for a decent price? Does anyone know where I can find lockers/limited slip/posi for this drivetrain? What gear ratios and rear ends are stock in these?

I would also be interested in selling the complete vehicle. What can we make happen?