SJS, I will just say one last thing (which may explain why I left out the caveat you were looking for) and that is that if there is such a psak it is unpublished. It is not the first time that I have heard reference to exactly this unpublished psak, either. If R’ Moshe (or whomever else it is to be ascribed to) did not see fit to publish the psak, why does oomis feel that she should? The poisek definitely had the means to publicize his opinion if he felt that it should be public. There is a concept of halacha v’ain maishivim, which it goes without saying applies when it comes to laypeople speaking on an issue where poiskem are silent.
With that said, I do sincerely apologize for any harsh words, which were not in any way intended to attack oomis personally.