And found mostly on the usual suspects over there - MCN, Gumtree & eBay. Google "moto guzzi V11 UK" and browse through the listings. Also check out the clubs (MGC GB) and forums (V11 Le Mans, Guzzi Rider, etc). I picked up a mint 2014 Le Mans last year for L3,600 - it was on MCN. The V11's for sale were all over the island, but the 1100 Sports seemed to all in the north. I was told that a bike could be shifted anywhere on the mainland for L90 or so. But it's a small country, so you could always train it (once you figure out how to the long distance train tickets cheaply - there's an art to it) and ride.
There doesn't seem to be many V11's around over there at present, but that could/should change.
Enjoy the hunt & good luck,
Mal