I believe there are many more hidden/forgotten in sheds around the country (UK) and certainly, a few more still exist than you mention, There's about 70 ss100 still out there and a fair few ss80 also.
I have heard rumours of a guy in Cornwall with 2 ss100 tucked away and every year some forgotten gems are rediscovered.
Lof A's number 7 was returned to Brough after his accident and repaired and resold
All I have is some of those parts you mentioned hung on my wall of fame. Lots of cool names here.
I hear rumors a little, too. There's always some really remarkable things being found.
There's a glorious wall. I just love stuff like that. Good for you! I am officially jealous. About the best I have hanging around is a pair of valve covers off a '63 Corvette fuelie and a pair of rear sets from a Hayabusa hanging around my house :)
Speaking of finds, there are motorcycles in sheds in the US, too. This 1911 Pierce Arrow 4 is a fairly recent find (it was sold in July) and it's unrestored. Looks like new. This is NOT my photo:
98i0
Source
That's rather cool, I love the Century bikes with the white rubber. I've been trying to get a friend to sell me his 1912 Triumph but he's still saying no. Can't blame me for asking and I shall keep doing so.