The other way is to get in touch with the resort of choice Tourist Office and ask them for a listing.
PremiereNeige have superb large chalets, catered or not- in the lovely resort of St Foy Tarentaise (near Val d'Isere) some right next to childrens' ski school and lifts- but they are very pricy.
Also has places.
Hope you find somewhere nice.
Price of one place I know if available, 5460 for the Xmas week for max 6 persons, + 200 final cleaning, + 30 per person linen/towels + 210 sauna usage (all CHF)
no idea of the local tourist tax or if you have to pay, but if you did you pay to the local tourist office
Hopefully you will find somewhere more reasonable
Bear in mind you would need either 4 wheels with winter tires otherwise chains as you will more than likely be travelling in the snow