No. But they should and will imo. I would expect it on the SR platform but I'm not sure it can take the pounding. Let Rugers guys figure that out. I think a P95 style gun in 40 would sell too. Probably even better if you made it 80% to scale.
There you go! And make the mag disconnect a factory option. Single stack? Or chub it up a little with a double stack? Ruger should come here as members, listen, and make the guns we want. Probably not.
Agree with the comment above on the Sigma. I have a 9mm Sigma and the only real complaint I have is the nasty trigger pull. I think when the Sigma first came out they experienced quite a few problems with ftf and fte, however those issues seem to be worked out. As for a .40 cal. handgun I have a G22 Glock which I am impressed with. Good luck.