Well Bob, I might be wrong, but as far as know yes there's such thing in BIB, at least for jazz tunes. There are about four different trade four real drums by Terry Clark; here's a description of one of them: "This is a 'trade 4s' style. In the B section of your song, world-class drummer Terry Clarke will alternate between playing a drum solo for 4 bars, and regular playing for the next 4 bars."
What I have done in the past since I don't use BIB for live playing, if I want to create a drum solo of more than 4 bars i just open a blank song with the desire tempo and put "B" part markers every eight bars an let it play, then record that and cut and paste in my daw the parts I like and insert them where I want the solo.
Here's a tune I created four years ago where I used the method above described. Hope this help.
One step further

Mike B

Music should be part of your life
http://www.soundclick.com/blackcatjazzcafeband