Annraoi......There's a somewhat-schmaltzy MIDI version of this song at:
http://geocities.com/Heartland/Bluffs/7812/brnxttrdrop.mid
You can pull the music out of that if you have composition software such as Noteworthy.
A RealAudio sample of the Freddy Fender version can be heard at:
http://cdu4.cduniverse.com/programs/hurlPNM.exe?/69537976/~r-457027/0034691_0101_00_0002.ra
Freddy had a big hit with this one. As I said, it's readily available on CD.
Good listening......Tiger