Have you considered Bulgaria? If you are frequent skiers then you may not be as inclinded to go as the ski areas are not extensive. Suffice to say it works with young children. I travelled with my family 2 years ago in peak season (the New Year period straight after Christmas). We stayed half board in a hotel and had childrens ski clubs included. The whole lot came to just over £2300 including passes.
Let me know if I can be of more help. I own the travel agency, Travel Matters (off of Nightingale Lane SW12 ). If you end up booking a chalet hotel style holiday with flights and transfers up the mountain, it should not cost you any more money and will save you precious time, if we looked into it for you.
As some one else mentioned, there are the likes of Ski Esprit, Neilson, Crystal, Inghams etc. Let me know if I can help further.
email
info@travelmatters.co.uk
Tel 0208 675 7878
Best, Karen