I do not think any of R200 R3 were fitted with electric wing mirrors loom if they were fitted with manual mirors.
Some R25 were fitted with loom although manual mirrors were fit in gactory.
I needed to fabricate my own loom in order to implement electric wing mirrors on our R200 mk3.
do you have any more info you can share? I'm capable of doing the wiring but I'm a bit concerned about getting the door looms in and out