Work on the dash is just about done. I got rid of all this old perished foam:
and installed new foam. This is a Bunnings product. It has excellent adhesive on the back of the foam
https://www.bunnings.com.au/whites-50-x-5mm-x-1m-adhesive-rubber-foam_p3961980
Left some messages for the next guy. One of the four mounts was totally exploded so I decided just to leave it. The other three seem pretty robust now, I gave them a few shoves to see if the plastic would crack more and it didn't. The glue is one of those thick adhesive filler products just to take up all the little clearances around the plastic.
I also repaired the hinge points for the glove box, as they were also shattered, and the mount points for the driver kick panel, as they were also shattered. Pretty much everything in this dash is some variety of shattered, and I am not the first person to come in here repairing things.