What were these cab extentions called (red truck)?

If I had a million dollars, first thing I would do is put one of these extended cabs on my access cab. What were they called, anyone know?

 

I want a bench seat out of a Blazer back there, maybe just a small sofa.

 

I believe that is called a "Custom Cab". Googling Toyota Custom Cab brought me to this: " "

 

kentuckyMarksman is correct. Friend had one in high school and was quite roomy for any pick up at the time

 

But why? Looks like all you would gain is 6 inches of head room but you would lose two doors. Not a trade off I would make, but TEHO.