I dont think anyone would have their actual details, and also it would be kind of horrible to post them on the internet, but you can contact them through their agencies, maybe that will help you?
This is off his website:
If you would like to send fanmail to Robert you can use the following address.
UK Address:
Robert Pattinson
c/o Curtis Brown Group Ltd.
Haymarket House, 5th Floor, 28-29 Haymarket
London
SW1Y 4SP
England
LA Address:
Robert Pattinson
c/o Endeavor Agency
Stephanie Ritz
9601 Wilshire Blvd. Floor 3
Beverly Hills, CA 90210
USA