The Makarov is a blowback action and will not hold 9mm P.
They tried, with a heavy slide and grooved chamber but it did not work.
I have a picture of a custom Ruger Mk I .32 S&WL wadcutter gun.
It would be a tough sell in the present small bullseye market and Ruger is not likely to tool up.
Ol Gaston is probably looking at all the Internet Cries for a single stack 9mm and then looking at the sales of G36 and shaking his head.
A nice .22 single shot pistol is something like the nice single shot shotgun I once read about. "Yeah, we might sell 50 of those a year."