Here are a couple places you can order them.
Tiffany Publishing Company
1911 Colonial Avenue
Norfolk, VA 23517
(757) 622-2915
(757) 627-1898 FAX
e-mail:
tifpubco@pilot.infi.net
Internet:
http://www.tiffanypublishing.com
Certificates,
U.S. Naval Institute
291 Wood Road
Annapolis, MD 21402-5034
(410) 295-1053
e-mail:
certificates@usni.org