I am trying to replace an old ceramic towel bar that was originally installed in a tile wall in my 1950s bathroom. I've read through a few threads but I have a unique problem. When the right bracket fell out, it revealed that there's no sheetrock behind the tile in that spot. So I'm ready to reset the bracket with Thin Set Mortar, but it seems there's nothing to attach it to... in otherwords, it's a big black hole into nothing. I am not equipped (nor skilled enough) to start replacing tiles, etc.. I just want to find a way to put that bracket back in... Any advice? I'm very new at this.