Well . . . not just any party or any platform  – but, the Democratic and Republican Parties and the 2012 election platforms.  Search no further . . . .  The American Presidency Project, established in 1999 as a collaboration between John T. Woolley and Gerhard Peters at the University of California, Santa Barbara, has an archive of over 100,000 documents related to the study of the Presidency.  The National Political Party Platforms section in the Documents area of the web site contains the platforms for political parties receiving electoral votes from 1840-2012.