My tamed Zebra Finch has flown away :(!?

Find your bird before you think of replacement. Chances are it is close by and probably starving. Spend all the time you can outside searching. It will die outside if not found. Domestic birds do not know how to find food or protection outdoors. Check with your local pet shelters. Someone may have turned him in. Also try calling different local veterinarian offices. Lots of people post signs of lost and found animals. Please try and find your bird before he dies, before you buy a new one.