Recoveries are always the hardest thing to obtain in a recovery unless their blatantly given to you. When retrieving information, some important sites to use would be:
http://Spokeo.com/
http://Pipl.com/
http://411.com/
And, the BIGGEST one to remember to use is:
http://google.com/
When searching for an account on google you can use these methods:
"Username_Here" Runescape
"Username_Here Runescape"
Username_here "Runescape"
Those three will most likely pull up the same exact results but sometimes they can vary. I hope this will help you out in recovering
. I might make my own little TuT on recovering accounts.