How can we compel brother to give us the original will?

My ex-husband's mother died in August of this year. According to her will, my ex-husband was named as the executor. His brother actually has the original will, while my ex-husband only has a copy of the will. There is bad blood between the brothers and the brother won't give him the original. My ex has spoken with several attorneys and according to them there isn't anything that can be done without the original will. The brother is residing in the home that is to be sold and hasn't paid any of the outstanding bills that was in their mother's name. This has been a very "UGLY and SAD" situation. What are my ex-husband's legal rights and what should he do to get his mother's final wishes carried out? Any help that you can supply me with in order to help will be greatly appreciated. The state this is in is Georgia....just in case that was needed for law purposes. Thank you!