The Battle of Britain Memorial Flight still has 2 and there is at least 1 in the US I think. Other than that there are not many - most likely less than 5 or 6.
According to the Daily Mail article linked from the blog link earlier in the thread there were a dozen (presumably airworthy) Hurricanes at the time of the accident. However there was no sourcing for that number in the article so I can't vouch for its accuracy.
According to the latest Aeroplane magazine which ran a Hurricane special , there were 13 (now 12) and 8 undergoing rebuild to flying status
If anybody wants the serials or where they are , I will "borrow" the info from the mag