backing spacer available for this lock?

Thanks for your patience during this busy season. It sounds like you need the shim that used to go with the 82-051 lock. I've had a couple requests for this in the past but have never been able to find it. I don't think it's made anymore, though I guess it's possible that it's under some rock we haven't yet turned over. I can tell you that we can't replace it at this time. We may find it one day in the future, but there's nothing we can do now.

Would you be able to use washers at the four corners to shim it out to the same extent? If not, check with a local hardware store to see if they can cut a flat piece of metal to size that will work in the same capacity. Sorry we can't come up with a better match!