Though I always do it acker peller meself, try these:

            D     A      D
  There are sober men in plenty
      D         G      D
  And drunkards barely twenty
            G           D
  There are men of over ninety
           Em        F#m      G 
  Who have never yet kissed a girl
           D    A        D
  But give me a ramblin' rover
       D      G       D
  From Orkney down to Dover
            G                D
  And we'll roam the country over
         A           G        D
  And together we'll face the world.

Same chords for both verse and chorus.
Alternatively, if you want to leave out the minor chords in the 4th line, you can replace them both with an A (or A7). Maybe you can do that on the chorus to make it a bit different.