If it only the holding lugs that are damaged a couple of big washers would sort it out.
I can get access at the rear so was just going to put a patch over the crack and might also fit a bigger washer as you suggest Noel, it might snap off over the winter months with heavy snow
i will probably order up the part .
Might be changing the Scenic as it will be needing tyres and brakes shortly
need to way up the expense