Is there an aftermarket replacement lock for "Fire King" file cabinets?

The Fire King fireproof filing cabinet has a push-in type lock. It is 3/4" round and about 2" long. It has a long slotted head screw on the back that acts as the actuator for the drawer locking mechanism. They have "Medeco" brand keys and the blanks are not available to locksmiths. I was hoping that someone would know if "Chicago" or another aftermarket lock manufacturer makes a replacement lock.

You can get a replacement lock from Fire King (see first link)
Or you can order replacement keys (see second link)

The third link is to their tech support for "replacement lock"

The third link is a locksmith with an online catalog and 1-888 toll-free service line. You could try them too