I was sitting there going through my inventory when I noticed I had several cure wands of the same type with varying number of charges. It would be awfully convenient if I could toss those wands in a stone of change along with the yellow or purple fragments that don't really get used for anything other than binding gear (and that not very often since everything and its pet cat is bound anymore) and crunch them down into one wand with the combined charges (not to exceed the maximum for the wand of course).
Or you could add Craft Wands as a feat. But I like my first idea better.