My ceiling is not done yet!
But, I plan to continue the design I used to mount my TV (which was one of the first projects I did)
I loosened the cab headliner and put in rivnuts where the push in fasteners were.
Then I bolted strips of wood that were cut the width of the headliner recesses and extended toward the back of the van.
For the TV I made a crosspiece and extended a board from that, also bolted at the bottom.
The the TV, bolted on from the back
The boards no longer extend back.. I cut them just about 4 or 5" long now. I can't have them there when I install the sunroof. (soon, very soon!)
When I get to the ceiling (soon, very soon), I will make short extenders and do the same thing all the way across. This will create 6 attachment points that I can screw a wood strip into. From there, a front fascia board should be easy! (famous last words...)