All of the Angels MIs are free agents next year. Kendrick, Aybar, and Izturis. I could easily see them making at least one available in trade, especially if Trumbo can play 3d. I don't know their minor league system and whether they have an MI or 3B candidate they are grooming, but that would be another way they might make an MI available.
quick check of BA has Jean Segura, their #2 prospect, on their 40 man and projected in mlb for next year.