Using Google Custom Search, I've created a new search engine for searching key websites in the history of spirituality, Gnosticism, Esotericism, Alchemy, etc. The search box is at the top of the side panel. Additions and comments welcome.
Further down the side panel, there are boxes for Nirmala Search, and other Google customised search engines of interest to enlightened researchers. Also there are search boxes for Google Scholar, Google Books and WorldCat.