I.O. Inc. is importing the a pistol-variant of the Soviet PPS-43 submachine gun. The PPS was first produced in 1943 by Soviet Union as a cheaper, easier to manufacturer and more compact alternative to the Soviet PPSh-41. It was an influential design that was widely produced . The later Finish M44 Tikkakoski, Spanish DUX Model 1953 and DUX Model 1959 submachine guns were direct descendants.

In 2010 Polish firm Pioneer Arms, located in the famous weapons producing town of Radom, began producing a semi-automatic version of the PPS with a closed fold. The stock is welded closed and so it is legally a pistol.

I did find a company called Royal Tiger imports of Indian Trail, NC selling them for $364.95 although they say stock is limited.