What about buspar? I was prescribed that pre BP diagnosis and it helped. And also things like benadryl(which is pretty much the same as Vistaril), and natural supplements like valerian, chamomile, and kava kava.
And advocate for yourself about this taper. Everything I've read is that slooooww is best. I was weaned off a big benzo habit in rehab and they did it so quickly (the insurance wouldn't pay for a slow taper or more time on the detox ward). It was not a fun experience.
Otherwise, I found yoga, meditation, and general mindfulness very helpful.