Both the PP and PPK have been made in both .32 and .380 as well as .22LR and, very rarely, .25 ACP.
Also, Bond's gun is a .32. It was mentioned in the movie Doctor No as well as several of the Fleming novels that the gun is a 7.65mm. 7.65x17 is of course the European designation for .32 ACP.
The PPK did not have enough "points" and was thus banned from importation under the Gun Control Act of 1968. All PPK pistols sold in the U.S. since that time have been made domestically under license from Walther.