You mean avoid learning how much give there is on other industries such as bodywork?
I reckon there is a little more give in the bumper industry...
To be honest with you, I couldn't face changing the whole unit for the sake of that small lug you can see at the bottom of the mirror unit in the middle which I think I can repair quite easily.
If I cannot fix it, I may well opt for one of these as it does look the same - I will then have a spare set of innards should I repeat my industry assessments or something break...
The thing with the Merc bits I've ordered is it comes in the right colour already - saving me having to dikaround getting it painted.