How to find someone, advanced

So I’m trying to find this guy I went to high school with on the internet for purely social and non-scary purposes. Ultimately, I’d like to have an email address, not a phone number (kinda awkward). He has a relatively common name, but I know the middle initial. I’ve Googled him to death, which was pretty fruitful, because it turns out he’s been fairly prominent in several political campaigns, the last one being for a politician that died. After that he wrote an article and made some comments about said politician and promptly disappeared (2002 is the last thing I found.) I’ve tried searching his name with our high school and college, but didn’t find anything. He’s probably like me and doesn’t update anything or send them money. I wouldn’t want to spend more than say, 10 bucks to get the info.

Any ideas? Thanks!