I don't think any have been made yet, but that doesn't mean they won't be. Just keep your eyes open someone may produce them at some point. I know that the XD9 had a 19 rnd mag so it shouldn't be technically impossible.
According to the gun designer of The Matrix.
Larry & Andy Wachowski: Who uses a .50 Desert Eagle?
Gun Designer: A wanker.
Wachowskis: No, who are they made for?
Wachowskis: Our wankers in this film want Desert Eagles.
Designer: Your film.