I was sat in the doctor's waiting room one day & a lady in there had the most delightful perfume on, I just had to ask (& I never do this normally!) what it was - she didn't know, just that it was a small selection she received as a gift! (I meanly thought at the time it might be Avon or something & she didn't want to say but it it smelt too 'quality' for Avon, OK though some of theirs are....I wonder if there is a chance if could have been one of these, long shot I know.....!)".
You may know of him already but I recently read about a British parfumier called Roja Dove - pronounced Roger, apparently - based in Harrods with a team of experts who can identify, track down and even replicate perfumes. I've just looked at the website and see there is a hefty charge for some of their services but I'm sure the article indicated that some of what they do is free. Presumably they can't make you pay for having a sniff at their extensive collection!