Welcome Ali!
the 2Vs are like buses - none for ages and then 3 of them show up (search on
www.biketrader.co.uk - there are even 2 900SE FE's for under £3k!)
There are a few carby 900 owners on the board who can tell you their buying experiences - my main piece of advice is to get the engine checked out!
As for mechanics, I am using Neil (Nelly on the board) @ cornerspeed. I am in London, he is in Nottingham - nuff said....
good luck with the search!
cheers, Chi