I think an easier to rack PM/CM9 would attract some attention. S&W hit it out of the park with their Shield EZ but it is a bit too big for carry for a lot of females. Sig's P365 is close but for those with arthritis that small slide can be a bear.
That said, NDZ makes some slide racker plates and they appear to be quite effective. They also make some parts for Kahrs, just not like this.