Yes, that would be nice if only I knew where to write or call, besides if I recall correctly I have to have the key number which I don't have or know where to get it. You see I've had my lock since the '80's and since I moved I haven't done much bike riding and now that I want to restart I've got the lock but no key.
I do remember looseing it once in the '80's and remember having to have the key # which I believe was on the lock but over the years it has shown wear and tear and can't find it now.
it may be better for you to get a new lock (unless your bike is currently locked to citadel)!
they cost less to replace than to have lock-smith explore-make key. another example of throw-away tech.
the citadel sounds like its from Kryptonite. try a locksmith. they make be able to cut a key. if you don't have the original key # you may be able to get an exchange from kryponite. they had an exchange progam some time ago when it was found their locks could be opened with a bic pen.
I sent them my old lock and they replaced free