The song is likely, "Cocaine Blues". Sadly, like the "House of the Rising Sun" finding any particular (old) version will be challenging. I have an old album (vinyl) which was a 'cut-out' version, but this was also a mess because Dave Mason's picture is on the front, but the rear is for something/someone entirely different (which is what the actual record was). One of the tracks lyrics went something like:
"Me and my baby are goin' downtown, looking for a little something to bring us down. Cocaine, running all 'round my brain. You take Bealle Street, I'll take Main......."