I have played and sung it for many years, I used to use a guitar but now prefer to use an accordian. I assume that you have the words so I'll put my chords for the first verse. if you want more email me at julmur@paradise.net.nz

    C                                                G7
When Cobb and Co ran coaches, from the Buller to the Grey
G7                                                    C
I worked as a livery stable lad, in a halt up Westport way
      C                  G7                  C       Am
And I gave me heart to a red head girl,and I left it where she
G7
lay
       F                C                G7            C
On the winding Westland highway, from the Buller to the Grey.



If the chords seem quite simple then that's the way I play.
To me the words are the most important. Hope I have been of help and that you enjoy singing this rather beautiful Kiwi song.
Regards Murray Kilpatrick.