Thank you for posting. Please see our 38-036 for a possible replacement to your lock.
A contractor from Minnesota says:
August 5, 2014
Close, but not quite right. 38-036 is meant to mount into a recess, I need one that is surface-mount with screw holes at 2-1/2" on center. It's Acorn brand in Bronze.
Casey from SWISCO responded:
August 5, 2014
I'm afraid your old lock is discontinued and no longer available. The 38-036 is the closest possible match, though I cannot guarantee it will work. You may also be able to make use of the shim that goes with it, our 38-036S.