here's some measurements I took from the new motor mounts that just went in.
You should be able to make up a jig/mould from this if required - I may.

The old mount that was still in one piece required me to slip a 12.5mm (1/2") piece of wood underneath it to make the same dimensions.
I guess that indicates it had sagged 1/2".

My indie mech thought I was crazy wanting the old casings back....

b22b