Thanks everybody, this is all very helpful. I am in Adelaide, and would love your recommendation Bardoe. I'm only a few weeks away from finishing radiation and I'd like to get on to this as soon as I finish that.
My cording only developed months after my surgery, but it seems to be not only persistent but worsening. I can't do 'downward dog' in my yoga practice and it's driving me nuts! In the meantime I will do the self-massage and continue with the stretching exercises.
Thanks again, your collective wisdom is so useful! x Heather