Probably not going to be able to get a crate that fits her in the back of a quad cab. I barely got a Large Kennel in the back of my Nissan Titan Crew Cab (scraped the heck out of some interior pieces.)
I have two larger German Shepherds and will be getting a Leer topper for them like my last truck. Most convenient option for me in this ever changing Colorado weather.
Might take a look at these for a bit less than a new topper: