From Navsource.org
Screw Scow:
Built in 1892 (place unknown)
Acquired by the Navy, 5 November 1942, in New Zealand
Commissioned USS Echo (IX-95), 4 November 1942
Decommissioned, 12 March 1944, at Wellington, New Zealand
Struck from the Naval Register (date unknown)
Transferred to the Government of New Zealand, 15 March 1944
Final Disposition, fate unknown
No entry for USS Kiwi that I could find