WilkersonMedia Do you mean you have a set of assets where the desired events are present which come from a newer Spine version or version of the Spine project, and you only have the old Spine project files? If so, why, can't you just ask for the recent project files?
If you can't get the up-to-date Spine project files, but have the exported assets, you could use Spine - Import Data..
You can also search the forum regarding adding events in Unity, and how to use Import Data..
to import assets back into Spine and create a Spine project from it. Also be sure to check whether you're using SkeletonMecanim
and the events have been added to the clip in Unity and not in Spine.
See this forum posting:
https://esotericsoftware.com/forum/d/15410-adding-events-in-unity-not-in-spine