| I don't know where they come from but I've seen two types. Fairing mounted one on stalks (ugly) and dinky little end-bar mounted ones (looks kind of quirky, but OK). The trouble with the latter type was that some mini indicators were fitted to the fairing and they looked truly awful.
It all looks a bit too Heath Robinson, not suitable on a 999.
I've learned to get an adequate view out of my standard mirrors by looking under my elbows, but I'll never consider them good. Still, there's no satisfactory alternative that I have seen, not yet anyway. | 
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