wow, mb28...this is really a big hassle, isn't it? Seriously! Any chance her H could be on facebook? You can look for people with the name and city.
But you know, I realize a pro like Allen or others may disagree, but maybe save yourself some cash and just mail a letter to his parents like you said.
The only thing is, and excuse me if this is a dumb question, why should the letter be anonymous? I would think you could list your contact info, email only if you are worried about them calling you....again, just wondering!
me,34 exH,34 S,16 months S:3/31/09-left for OW started DBing 10/09 d final: sometime 10/10 current: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2022856&page=1 met in 2004