I did exactly that over a year ago. I went with an RV Lock brand keypad locks. It was one of the most popular and highly-rated keypad locks on Amazon at the time. I haven’t had any issues with it yet. I would definitely recommend it, especially if you can get a good deal.
Looks like its on black Friday sale right now too!
I got the compact version, but there’s also the V4, which is a little more heavy-duty with bigger buttons. Be sure to watch the video in the product description as it has some helpful tips to help you get the right model and ensure it’ll fit.