Welcome to the forum and congrats on your new-to-you trailer.
We have a '59, so our lock is different. Not sure what the newer ones had.
Baggage door locks are really easy, assuming you have the same ones we have. See this link
. You should be able to remove the cam from inside the trailer and unscrew the large nut that holds it in. Note that the cheaper ones can be opened by lots of keys out there.
If you want a fancier version, with a unique key, see ch751.com
. We picked up this version:
TCL118 | 1 1/8" Tubular Cam Lock
Cam Length: 1 1/2"
Cam Bend: None
DUST COVER (recommended): Chrome Dust
KEYING: Keyed Alike