Hey Thanks Jarret! That sounds great!
I could send you more close up pictures through the email if you would like.
The inside of my bed has the same dimensions, 49" Wide X 76" Long, if you are considering purchasing one, I could sell you mine. It is a hard tonneau cover, painted red. My email address is email@example.com if you are interested.
I'm not sure at the moment but I will measure it tonight and get back to you.