Thank goodness you had a set of lenses in two different vehicles. I don't know if that was intentional or not, but either way, it helped to mitigate the damage. Better to lose some of your lenses than all of your lenses, especially for such an important shoot.
Hopefully your lenses turn up. One thing working in your favour is that large format equipment is becoming fringe. We are a small community.
If you haven't already, please post at largeformatphotography.info also. The more eyes watching, the better.