Never going to happen - you heard it here first.
The only way to get a holsterable (~10" OAL?) pistol hearing safe is to port it in front of the chamber like the Maxim 9... and once you strip that velocity you're basically removing the lethality of a pistol.
You might as well be paintballing, bro...
You could make a large frame G26 with a compact 9mm can on it, but that would be over 13" long.
http://i145.photobucket.com/albums/r...pssmp8i7xw.jpg
The whole "workman's comp" thing by silencer enthusiasts is silly. OK, we get it. You want a silencer. You probably want NODs and thermals too, right?