From memory, these might serve:

Am ~~~~~~~~~~~~~~~~~~~~~~~~~~~G1~~~~~~~Am
There were three brothers in Merry Scotland
Am~~~~~~~~C~~~~~~~~G~~~~~~~~~~~~~~ E
In Scotland there were brothers three
Am ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~G~~~~F~~~E
And they did cast lots which of them should go, should go
Am~~~~~~~~~~~~~~~~~~~Em~~~~~~~~~~~Am For to support his two brothers and he

No guarantees but its a starting point.

A