Call the Allegheny County Department of Court Records at (412) 350-4201 and tell them you're looking for information on a legal name change. They will describe the entire process to you, including estimated costs, and mail you the necessary forms. As of September 2017, these are the name change petition forms.
Certified copies of a divorce decree can be obtained at the Allegheny County Department of Court records. Consult instructions, fees, and hours. Divorce pleadings are filed at Allegheny County Department of Court Records, (not the Allegheny County Family Division).
In Pennsylvania a divorce can take anywhere from 90 days to a year (or more) depending on whether you filed uncontested vs. contested or on fault-based grounds and a variety of other factors.
Arbitration. The arbitration system in Allegheny County is compulsory non-binding arbitration with a ceiling of $50,000 on civil damage awards.