I'd hate to see Chartreuse (also the name of the local mountain range where the monks' monastery is based) become industrialized to the point where its authenticity is lost, for the sake of global market supremacy.
For an alternative, try Genepi. It's not a brand name, but another type of artisanal liquor made out of a cocktail of mountain plants and herbs. Taste can be lighter than Chartreuse, but it warms you up just as well after a day of skiing.