The MET should have at least 13 Ortiz Echague (monochrome work) and
probably many more, by Metzner, etc., in color. If they are not on display
it may be a bit tricky to have access to them if you are not known to them.
You would have to make an appointment weeks in advance through the
assistant curator.
To follow what is going on in NY, see Photography In New York:
http://www.photography-guide.com/index.html
Luis Nadeau
NADEAUL@NBNET.NB.CA
Fredericton, New Brunswick, Canada
http://www3.nbnet.nb.ca/nadeaul/