It looks like Bauer can sell you new lock cylinders -
link
If you want to go with a Keyless Entry system, Bauer sells those as well.
And
RVLock, a competitor to Bauer is a Heartland Owners Club vendor partner that sells great Keyless Entry systems.[/QUOTE
i was skeptical of Rv doorlock for a long time, but DW kept bugging and they had a sale I couldn’t refuse.
Long and short is I wouldn’t live without one.