Got a metal front door with Lockmaster lockset. On the lock side of the door there is one flat bolt towards the top and one flat bolt towards the bottom. Door has been sounding crunchy for a couple of days and tonight I couldn't get out as it appears the bottom bolt will not retract. Aside from hacksawing the bolt and replacing the lock/levers, are there any other options? The only access I can get is taking the handles off. Really don't want to have to have a new door either. Thanks