Here's Freya's introduction to the document:
This is not a complete or definitive listing of all possible parallel passages. These parallels have been compiled over many years by different people for use in a variety of specific works. I have simply transcribed their work into a database. There may be other sources of parallel passages I am unaware of and have not included. There may be books of the Writings for which no-one has yet researched parallel passages. I have not checked for the original accuracy of the parallels. If someone else says a passage is parallel, I have taken his word for it. Nor have I checked the accuracy of my typing. So, please pardon any errors.Now all we need is for someone to incorporate this into one of the search engines.