Honestly, you do not NEED any of that information. You WANT it.
Once you have her name, etc, if you do pursue getting it, it will do nothing for your M, your R, your GAL, zip. You will likely just obssess even MORE over whoever this person is. She is NOT the problem in you R/M.
Unfortunately, I discovered my H's A, so I had all the information from the get-go. Now that we're Piecing (-ish), all of her info and the emails I hacked into and read between them have been and still are a GINORMOUS roadblock to me LETTING IT GO. Once you get any more information, it WILL NOT HELP YOU. at. all.
Forget the former things; do not dwell on the past. See, I am doing a new thing! Is 43:18-19
If it seems slow in coming, wait. It's on its way. It will come right on time. Hab 2:3