tecra

This morning a fat woman in a honda element hit my driver side mirror and fled. The mirror assembly is broken free from the base and is hanging there by the wire for mirror motor. The glass and motor mechanism are ok. It appears that the plastic support that connect the mirror to the door is broken. I don't have a Bentley manual with me and my questions are: what parts do I need and what're the good places to get them? Do I need the whole assembly or just a part of it? Mine is 2001 avant and I don't have folding mirror option. Thanks in advance!