Well in the UK you are better placed than most in the world!
JAWS (John) is always a good place to start, he often has 'stuff'' around. If you are on the Brit forum there are others who can sometimes help ........
In fact the miror parts are not too expensive (excluding the miror glass itself) if you look at David Silvers site.
Ebay is a last resort, mirror parts often go for silly money and quality is often 'poor'.
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