Welcome to the Forum!
I have seen the Mantis system at SHOT,, as well as a few other systems. I really didn't look closely at any of them, because I feel you can develop skills w/o such systems. So I can't say if there is a specific system, similar to the Mantis,, for the SR-40.
But due to the fact the SR-40 is no longer offered,, and doesn't enjoy the mass appeal that some other guns or models enjoy,, I'd GUESS there isn't a specific system for them.
Sorry I can't be of any further help.
I just had a few thoughts to add.
I shoot USPSA,, and have since 1998. I have RO-ed, shot with, and studied many the top names in USPSA all these years. All of them dry-fire practice without a special system. They develop their own routine with just their gun, holster, snap caps, and even a full length mirror. Some use their red dot's as well as a laser to assist in their dry fire training routine. All are quite successful because they do dry fire practice, as well as live fire.
The one common denominator ALL of them have shared with me is how much they practice.
They build a routine. Usually about 4-6 times a week, they dry fire practice, as well as 2-4 times a week they live fire practice. They ALL focus on the basics of the grip, the draw, the presentation, and the trigger pull, as the beginning of their daily practice routine. Each & every one has said; "Get the basics down to where it's a deeply ingrained motor memory skill, and build from there."
Max Michel Jr., Todd Jarrett, both preached to me the necessity of how you must be able to get the exact same feel, the exact same presentation, and the exact same trigger pull, as a solid foundation of good shooting as a good warm-up in any routine.
If you can't find a system like the Mantis for your SR-40,, them maybe this little advice can offer some help.