I have such an adapter. The one I have is made by WELL SHIN. The problem is I bought this years ago over the internet from some small company I have never heard of and I can't find a link to it.
The info to go by printed on the adapter is:
WELL SHIN
ADAP, WS-089
5G00
E161470
LISTED
10A 125V~
41-27172
--David