I'm looking for an old large format combination lock to go on a National Square Cannonball lower door. It appears that the mounting bolts measure a pattern of about 3 1/2" wide by about 2 1/4" tall. Its will be a direct drive lock where the lock bolt blocks the bolt work. So its not a roller bolt or anything like that. The lock mounts Right Hand. The Cannonball door has an indirect drive S&G so I am assuming the bottom door will be an S&G as well. Anybody got anything laying around that they are willing to part with. If I have to redrill and tap new mounting holes I can, just hoping to get lucky. I have a guy buying this thing from me but he wants a lock on the bottom door and just sticking a 6730 on it I think will look tacky.