It will definitely fit 4 and almost certainly 5 bikes. The pad itself holds the frame of each bike fairly securely with a velcro strap so the bikes really don't move around much.
They are available. I should have posted my initial post earlier as I drove through Portland on the way to Seattle after picking up my Gladiator in Nampa, ID. I also have a set of rock rails if you are interested.
FYI- since I didn't want to wait until next summer for the smaller Dakine version, I picked up a Dakine DLX, size small, and it works really well. Width-wise, it is perfect. Oddly, however, it is about two inches too tall such that there is a bit too much material covering the back of the...
FYI- I emailed Dakine as I am looking for a tailgate pad for my Gladiator and they responded by saying that their existing tailgate pads are too wide but they have something in the works for 2020. Below is part of their response email:
"Your best option will be a new product, coming Summer...