The “Becky” lock is out of production. If you find one be advised that there are no parts available. I would pick a suitable Siler. Although I like the L&R styles that are available, their quality control isn’t very good.
IMO, with one exception, no one makes a pistol-sized lock so small rifle locks have to suffice. I use L&R Bailes and small Siler most often. L&R does make a small back action lock that is pistol sized.