I would like to request a copy of my parents trust from my brother, how do I legally do that?

My parents died leaving a Family Trust in which my brother was named executor and trustee. I have never been allowed to read the actual trust and as far as I know my brother has the only copy. I contacted the only lawyer I have knowledge of connected to the case (he represented my brother in probate court) and he no longer has a copy. How do I go about requesting a copy from my brother if we are not in go standing with each other? Do I have a right to a copy? I am named (according to the will which I requested from the courts) in the trust and I am next in line of succession as Executor. Thank you for your time in this matter, it is greatly appreciated.