My original locks seized within two years, so I took the opportunity to change to a different assembly. Most locksmiths have a wide range of similar locks, just take a sample so you get the correct depth. Mine cost about $3 a unit, all are keyed alike, not 751's, and I was able to get weather covers for $1.30 each.
2012 Jayflight 28 BHS
2014 F150, 5.0 L, 3.55 axle