Icon for (windows) *.ads & *.adb

[jpwoodruff@irisinternet.net (John Woodruff)]

MS Windows directory display window is able to show a distinctive icon
for each file type -- in the case of Ada source files, it (should be)
a portrait of Mme Ada.

I have somehow misplaced those icons.  (But not completely lost them; 
files with extension *.ada still show a proper portrait icon)

I know how to assign an icon to a file (using "view : folder options
..." menu).  But I can't find the file that has the Lady Ada portrait.

Can someone please tell me how to find those icons?  (I search the
"usual places" for files of type *.ico without result).

Thx
John