The original piece is part of Bach's Orchestral Suite No. 3 in D major, BWV 1068, written for strings ! The manuscripts vary but the Coethen version is probably the best
All I even have is the music for classical guitar. bypass to the quite a few web content of Bach music, in simple terms type in loose Bach music, type interior the Air on a G string and notice what you will discover. i've got seen it available yet i can not remember the place, type it in distinctive techniques like classical music by Bach etc, and that i'm particular you will discover it. stable luck !!