I jimmy rigged my 26" tv in my truck. I have a pete 379 with the little shelf sticking off the right side of my cab over the bed... I took a cheap cooler I wasn't using anymore and ratchet strapped it to that shelf... drilled 2 holes and put a 26"-32" tv mount right onto the side... then mounted my tv. When not in use (ie rolling) I throw a pretty hefty blanket over it and bungy strap it against the cooler & cabinet so it don't move. No scratches to date nor any problems either. This would still work in a cascadia with a smaller cooler and 1 ratchet strap. I don't know how others do it but.. this worked great for me.
And, before anyone asks, thats a DirecTV HD DVR underneath the cooler.. when stopped for an extended amount of time I toss a vuQube on the top of my cab and get satellite for the weekend.
Pics...