I tried it using F5 to change the RealTrack at another bar but it only has a simple RealTrack picker dialog with no option for Held DI Bluesy Simple ect..
Another way is move the track to a Performance track then to the Audio track. If you do the same in another instance of BB you can copy from one audio track to the other pasting the held section in front of the normal section..
There might be another way someone else will come up with.