FR - City of Splendors has an item (page 150, costs just over 13k) called a spell-lens; it attaches to a wand and automatically Enlarges and Empowers the spell from the wand; downside is, it "costs triple the normal number of charges," to cast the spell. Since Enlarge is +1 spell level, and Empower is +2, this is still a net gain over using Metamagic Spell Trigger if you consider 'the normal' cost to be figured *before* applying metamagic spell trigger. Obviously if it triples the wand charge usage after applying metamagic spell trigger, you're not going to net much at all.
