Hi Dread , When World of Warcraft updated to Legion they updated all of Sylvanas Windrunner’s DisplayIDs to feature the new model, ModelID 8454, so now I do not believe any displayID’s exist featuring the old model above.
I’m sure some other people might prefer to use the older model over the newer one for their Sylvanas npc in their phases.
The Model ID of the old model is 3027, so its just a matter of creating a displayID that uses that Model ID. I believe its still in the game files (Hopefully)
Thank you Dread