yo i made a save file right before collecting the last playboy magazine in case you want the achievement without having to replay all 15 chapters, here's the link :
GoogleDriveLink[drive.google.com]

location of save files : C:\Users\yourname\AppData\Local\2K Games\Mafia II\Saves\76561198848759467
if you dont know where to find it : click your search bar, type %appdata% press enter, and go back to the AppData folder

enjoy