Just get an entirely new lock assembly, probably Trimark, or get an electronic lock, RVLock.com or Kohree or Bauer.
Travel trailer locks and motor home locks are different, so be sure and get the right thing.
'03 Ram 2500 CTD, 5.9HO six speed PacBrake std cab long bed Leer top and 2008 Bigfoot 25B21RB.. Previously, 2008 Thor Freedom Spirit 180, SOLD! 2007 Winnebago View 23H Motorhome, SOLD!