Hi Sean,
I have CUP 8.0 in my lab at the moment and I could not find any such feature. I searched a bit but I don't think you can do it even in 8.5
I checked the release notes of CUP 8.5 (new and changed information) and also the release notes of CUPC 8.5
I agree with you that this is a nice feature to be added.
You can discuss this with your local cisco account team and file a PER (Product Enhancement Request)
If a lot of people want this it has a lot more possibilities to be added as a feature in an upcoming release.
Hope this helps,
Christos