This is ok...reach out to those authors and share your passion for what you want to do and then ask them how to tweak the work in an interesting angle, you will be amazed!
Quote From aje34:
I was preparing for my first year progression review and was trying to find a paper I had seen for my literature review. In looking I stumbled across a term that I had not checked before in my literature searches which lead me to a significant number of sources who had done roughly what I had done and had thought had been unique. What do I do and how do I tell my supervisor? My review is in a week. I had always maintained in meetings that I had been unable to find sources doing what I had done but that I wasn't 100% sure that I had not missed something.