In several of Lewis' (relatively) little known journal articles collected and published as God in the Dock, he uses presuppostional questions without labelling his method.
But he does it all the while with a pre-modern Medieval epistemology more akin to Aquinas or Anselm than to Van Til.
And Megan--do read the classics: read your Augustine, Anselm, Aquinas (the three A's of pre-reformation theology), your church fathers, etc. You will not only be richer, but you will have a better understanding of what Christianity actually teaches. Improve your theology.