This might be just what you want, but it is pricy - http://www.backpackinglight.com/cgi-bin/backpackinglight/2014-bpl-staff-picks.html#.VKkfSHuLXiV

It is not for high angle technical climbs, but more for crossing snowfields -superlight (carbon fiber and titanium) and I would check to see if the longest available length (70 cm)is long enough. For the price, you might be able to order something longer