Info needed- Howard street clock door lock-

[Rushton]

Hi all, I am restoring a 17' tall E. Howard cast iron street clock, and the door to the base, which contains the clock movement, is locked with the lock seen here in the pictures- it has been butchered, unfortunately, and can be opened with a screwdriver. It measures about 2 13/16" x 2 3/8". The lock is made of cast brass, and as far as I can see, it is unmarked. The clock is circa 1907. Any help will be appreciated- a source of parts, or a used lock, or even the maker's name will help. Thanks very much.