Hi I was just wondering why you cant wash the garment. I have been restoreing vintage clothing for many years and found that a gentle hand wash with a gentle detergant and hung in the sun to dry is the only way to eliminate the musky smell that is due to mold. Dry cleaning is expensive and the smell will return. You cant see the mold on colored fabrics but on a black fabric you can see it clearly. If washing is out of the question steam the garment with a steamer or the steam on your iron with out ironing it then hang out in the night air and leave all day in the sun, turn your garment inside out as to avoid fading, repeat this process until the smell is gone.

Hope this is of some help.