Finally got around to taking some pics. This project has recently taken a back burner for a while. Let's see if I can place them here:
The first one is from the drivers seat and the second from the rear. My thought were/are a device/holder to fit under that horizontal rail that runs the length of the van just above the windows (the lighter color one). This is heavy steel and I rather not drill into it. Can't go above it, cause that's where the canvas and screens lie. This rail is about 6" wide and the above portion is only 2".
Oh well, got a couple of months now to work on it. Thanks for all the replies and if something pops up please let me know.
thanks and I'll keep you posted.