not sure about Logic, but a trick i have used is to go buy a set of 12 strings, put the low strings on one guitar and then and then the high strings on another guitar. can be really cool sounding.
Back in my session days that was called Nashville tuned guitar. Mine and others I knew of were acoustics. Another variation I liked was 9-string electric guitar. Bottom three strings normal and then top three string doubled strings like a 12-string.
As someone else mentioned find a Danelectro 12-string aren't too expensive and sound good.