What kind of corset? I do not think that is the question you need to be asking, what you need to be asking is, "Where do I get one." And possibly, why someone of your gender wants female looking hips. If you are indeed a man.
Corsets can cause internal damage to your organs because they squeeze your torso so hard. Organs can be pushed at odd angles and while it may look good on the outside, the inside will never be the same, plus I dont even think they sell corsets except for just reenactments or stiff like that