Ancient Thor travel trailer door locks

[DasMike]

We just paid for a very old but very great condition Thor Citiation travel trailer. I think it's 22 or 24 ft long. It long ago lost any paperwork for owners.
They also have not had a key for the doors from previous owners. That's our main concern right now.
Once we get it on our property and get the real specs on it, is there any way to get keys for the doors? Is my only option to get a locksmith?

[EA37TS]

Once you get it home look at the lock and see if it is stamped with the key number. If it is just order the replacement on line. If that fails you can try to determine the manufacturer of the lock and contact them.

[fhenn]

On mine you remove the lock, and inside of the lock is the key code