I'd recommend looking up a local locksmith or hardware store that can duplicate barrel/tubular style keys. My local hardware store can duplicate if needed.
I've used this site successfully as well. If you can find a direct replacement they do have blanks and I'm sure they can work something out to get what you need.
Along the same lines, does anyone know where I can get keyed alike barrel style locks for my US General boxes? I hate having 3 boxes with 3 different keys
