Humour is how I deal with this kind of painful experience!
I think I need to provide a little more detail as mine are heated/electric folding etc. etc.
Have a look at this post - which has photos so you can see what I mean:
W211 Mirror Blinker Replacement
Basically, I am after the metal frame from picture one that I described.
I also need both parts of picture 2 (including the lense for the indicator strip).