Missing person. Please help

'annearthur08@yahoo.com' My stepson Timothy Ryan Arthur went to Australia in April of 2008.He hasn’t been heard from since July of 2008. He is 21,he has brown hair,blue eyes,he’s 135-145 lbs.,he’s about 5″10-5″11. I know this is probably weird. But,we have contacted everyone else that we can who might help.Like jails,police,hospitals,newspapers,missing persons websites. If you have any information, please contact me or the Missing You Foundation. ”Thank You”, Anne Arthur