In reply to Robert Lavin:
At Gouille on the road from Sion up to Arolla there is a bolted ice fall opposite the Bar du Lac Bleu. I've not actually climbed on it, but it looks amenable and is so conveniently placed for a couple of days practise.
There is another icefall in the Aiguilles rouges area I saw while si touring a few years ago. It looked substantial. Again I think it's a 3 - 4.
It may come to mind soon.