Oh my! What a dilemma!! If it were MY stockings, I would either (1) get a whole new set of stockings if I wanted them all to "match"; or (2) find similar fabrics in design and colors and make the two additions with those new fabncs. But if the person has her own ideas about matching, and the fabric cannot be found, it would be impossible to please her. Perhaps give her ideas for alternatives. good luck!