Terrie, you probably don't need a lock that is 2 1/4". I too had one of my cargo doors with a 2 1/4" lock, but all I needed was a 1 1/2". Measure the thickness of your door with the lock removed ( through the hole, not on the edge). If I remember correctly, my door was 1 1/4". I'm guessing yours is the same. You can order the cam part of the lock with the correct amount of offset so it's a good fit.
I recommend ILH as others have. Give them a call. They were helpful to me
Rod & Carla B.
The Hounds Kooper & Abby
2015 Sunseeker 3010; '14 Ford Focus toad