If I understand well you want to bounce an audio region/VI to an other track without importing it back on a new track by yourself.
Since offline bounce is out in PT, best way you have is to record to a new track.
-Route your source track to a bus
-new track input feed by this bus
-record
You can also do it this way (it's what I do when working on vocal tuning):
-you have 2 track (source track you work on and destination track)
-put a pre fader send to a bus and mute your source track
-destination track feed by your bus
-record arm your destination track and put it in input monitoring
-now select the region you want to bounce and hit Cmd space
-done
Second workflow is great when you want to print down various region (when working on vocal tuning, or with VI for example).
Hope that help