As Kimberly mentions, our hair loss issues are typically transient ~ the body removes resources from our hair and nails while our thyroid hormone levels are abnormal OR while they are "traveling" rapidly ~ so such a hairpiece might actually be more than a patient would need. In addition to that, it "stresses" the hair by being woven within it, so might actually cause more hair loss than would typically occur. Just an FYI.
Our usual recommendation is to do something with your hair that requires VERY little fussing (short cut, no color, nothing you need to tug, blow dry, chemically treat or use heat) until levels stabilize within the normal range. At that point, good, strong hair will return and you can go back to whatever you used to do.
