The 3913/3914 are the DA/SA version of the 3953. The 3913/3914 Lady Smith or 3913 NL (N Logo) have a slightly different frame in front of the trigger guard in the dust cover area but my 3913 NL fit in every 3913 holster I tried.
Watchdog Tactical in Charlotte, NC molded a 39XX AIWB holster for me a few months ago. They used my 3953 as the mold. It works with all of my 39XX pistols. In fact, carried a 3914 DAO in it today.