Find a locksmith in your area. Brand of trailer does not matter. Brand of lock matters. Depending on your lock mechanism, it may be one that has been out of production for 30 years or more, with an unusual shape. I had to pay $$$ to get a lightly used 40 year old lock for my 1977 Trillium
, which uses a Barman L-400
(one of the more expensive vintage locks out there). I'm keeping a small hoard of replacement locks and repair kits for the future.