I haven't been very productive, the cars been broken a month now! Hopefully it'll be sorted soon..Good to see you getting some progress here
I got a new mirror today. It's a Raydot replica, which were also called Downton mirrors.
The door looked like this with the old mirror removed. I'll get another rubber grommet to block up the second hole
And installed
It bolts into the front window catch
I've also got all the bits to rebuild the diff with the HS joints. One of the planet gears is a bit loose on the diff pin so I'll need to chase that up. I made a little progress today and removed the uni joint from one of the HS joints, I'll need to get some proper circlip pliers to get the other one apart