No, there is no Double DIN kit available for your truck. 

Yes it can be done. 

 

It will be a custom job. So it will depend on how much you want to spend, and how 'finished' you'd like the finished product.

If this unit isn't a upgrade option without much expense, are there other manufactures that I can choose

with Sat. Ready, Rear Camera & Nav System specs....

Will I be forced to a smaller screen or can I still get the 6.5 to 7" format?

We have a single din flip out screen on the futureshop website that you can look at. 7" screen, GPS. It's the Pioneer AVIC-N5. For for all that stuffed in a flip out, it's more expensive. I think it's worth it, if you don't want to modify your dash.