From the way you phrased your question I assume that you know there is a study. If you have a legitimate interest in the study you may contact either the study's client (for whom it was prepared) or the study's author and request (and possibly pay for) a copy of the study. If you aren't an interested party in the study, then it is up to whoever owns the study.
If there is no study, commission one and pay for it!
May 22, 2015