Using 3dQwarp to co-register blip-reversed EPI runs

Hi AFNI folks,

Bob Cox mentioned a script for co-registering EPI runs acquired with blip-reversed phase encoding directions that uses 3dQwarp (instead of Topup). Is that scrip available anywhere?

Thank you,

Leo

That method is included within afni_proc.py and by itself as unWarpEPI.py.