Hiya
I hate skiing with a passion but Herr Indoors does not

So he and his friends have been using
Grether Reisen for years to find chalets and will be using one of their's in January. This site is only useful if there are 8 or more of you though.
It is a *bit* late though but you could get lucky, particularly if you don't mind not having a very luxurious chalet. New Year's Eve is very, very expensive though.
Hope that you get lucky,
Katrina