Go to their websites...
https://bauerproducts.com/
https://www.rvlock.com/
...and match up your current lock with the pics they show for replacements.
There are some door locks that Keystone used a few years ago that have no replacements available.
Also - try searching this forum ("search" in the first brown bar above) for "keyless lock" and there will be lots of threads with good information.