About a year ago I installed one of Jim Chambers Late Ketland lock in a DGW Tenn, Mtn rifle for one of my regular customers. It took a little bit of inletting and fitting but wasn't that much of a job. He was thrilled with it and it replaced a marginal, barely usable lock with one of the best locks available. Not sure if the model he had is like yours or not but if you have a Track catalog with the full size photos, you could see if it would fit.