Try The Bandit of Brazil. A simple yodel at the the beginning and middle line of the chorus. Tex Ritter tune I think.
I am the quickest on the trigger, When I shoot I shoot to kill,
I am a legend down in Rio, Where they talk about me still,
I robbed a rich ranchero, He was rich beyond compare,
And for ransome held his daughter, she was young and she was fair,
Oh lay, me Gon Goucheros, Ia m the bandit of Brazil,
Oh Lay EEEeee, I'm a bad Man when I shoot I shoot to kill,
She was young and she was tender, There was love light in her eyes,
When in my arms she did surrender, very much to my surprize,
I refused her father's ransome, Oh, I kept the greater prize
Now at night we ride together, Under blue Brazilian skies,.
repeat Chorus twice.
Good luck finding a melody track, the only recording I have seen of this song is by Nicky Seeger, wonder where he is now.