I have an ongoing dispute with someone in Canada and I am unable to get in touch with them. I have phone numbers, work details, addresses, family members' information.
I will post all these details later on today. I am willing to offer 0.2 BTC who helps me track down the person, I prefer someone living in Canada.
Quoted for reference.
What exactly are you looking for: someone who gets him on the phone, or someone who delivers him to your doorstep? $1900 sounds like an aweful lot of money if you know his address already.
Just an idea: have you tried sending him a letter?