It's a fine song that doesn't need to be messed about with. Surely you could do a better arrangement on your own?

One thing to remember: I think you're in the US, and while the language of that song is not hard-core Scots, there will be words it's difficult for an American audience to catch ("bleacher" is not something you sit on at baseball games). An over-fussy look-at-me accompaniment will mean a lot of people will lose track of the story.