Here's a true side view with the template laid over it. This will be more useful in actually constructing the structure than looking at photos with perspective.
Sorry I couldn't get a plan view- it appears all the other blueprints on the net are the Euro-spec Ranger which is very different from ours.
FYI I have an SAE paper here from Texas Tech (#881874) that says an Aero Shell should net you 10-20% drag reduction. This will probably translate to 5-10% MPG improvement. With that and a nice smooth coroplast belly pan you could probably get 10-15% MPG over the stock body.
I agree with skyking though. If you could build a metal framework off of the frame it would use similar techniques as you'd use for the topper, but on a larger scale. Skin it with coroplast, sheet plastic or sheet metal. Having a smooth side will help you a lot and custom building the entire rear half could REALLY help you out!