As navigator, Lucky has sniffed out many-a road, but grumbled at the gaping void in front of his chosen perch. Something needed to be done! A bigger platform was in order and, due to the odd shape, a template was needed. Lucky supervises while the cardboard is roughly fit:
The colored strip was used as a scribe strip against the various short angles
Here's the resulting piece cut from a square of OSB. Here, the colored strip is laid along the back line traced in the van so the front line can be traced on the wood
Resulting wood platform in the van
While it fits well, with a couple inches foam, it's going to be really high. Hmmm... Plan B maybe in order. After more templating and cutting, we have this
With a milk crate base and a couple inches of foam, this will be about the same height as the front edge of the seat.