I haven't come across the tune elsewhere, and I am notoriously badly equipped both with hardware, software and with brains for sending tunes. However, if I manage to find some helpful soul to post another tune for me I'll send this one along.
I've got it on an Iain MacKintosh album (I think it was 'Live in Glasgow', back in 1979), but I don't think it's commercially available any more. Sorry! - Susanne