I'd be very surprised if the keys for office desks, file cabinets and the like don't fit your lock. It's a very common type of lock, with only the end piece that has the "latch" shape being unique. I expect that any good locksmith can cut you a key, like Dom said, or if you know a maintenance guy at a large office building those guys have a huge collection of desk/cabinet keys, just to handle the "...somebody locked it!" calls that they get weekly, and he may give you a key, or two, or three.