check out *History Central* (dig that name): http://www.historycentral.com/elections/index.htm#history
Has state-by-state results dating to 1824 by which time 18 of then-24 states had "popular" elections of electors. For some reason, however, 1992 & 1996 do not include Perot state totals (whereas 1980 includes Anderson, 1968 includes G. Wallace, 1912 includes Debs, etc.)...
Also, Klipsan Press has on-line presidential election atlas for 1932-1996 that includes state results: http://www.klipsan.com/usp_web.pdf
Michael Hoover