I'm sure I'm not the only one who misses the old sound effects for Templar's Verdict. Since there was no addon which replaced the sounds for it, and I couldn't find the sound files anywhere, I opened up a client for a private server still running cataclysm, and recorded the sounds from there, so that I can make one myself.
This addon replaces the sound effects for Templar's Verdict and Final Verdict to those of Templar's verdict during Cataclysm Preview: https://www.youtube.com/watch?v=DIEv7UMWAU4
Installation instructions: Do not extract it to your interface/addons folder like most addons, or it won't work. Instead just extract it to your world of warcraft directory (where the launcher exe is found) if you have other sound addons installed, make sure you hit yes if windows asks to merge folders
--UPDATED FOR LEGION--
Sound in game changes pitch randomly when cast, and sound is now also applied to Justicar's Vengeance talent. This is not under my control, but if it was, I would not change it, since it is what I would have done anyways.