I do some work with the Guyana National Zoo in Georgetown, Guyana.  As
it is we do have some partnerships with some zoos in the states.  We
are very appreciative of the help and the resources they have given
us.  What we need to do is expand on developing relationships with
zoos in the U.S. as well as in other parts of the world.  What I want
to know is which zoos can help to donate equipment, funding and
resources to our underfunded zoo.  Anything we can get would be
appreciated, especially equipment, funding and animal exchanges.

You could try this organisation

http://zcog.org/zcog%20frames/main.htm

They are the Zoo Organization Outreach Group. They say they are a
"non-profit consortium of North American zoological institutions, 
corporate  partners,  and  individuals  dedicated  to  assisting Latin
American zoos and aquariums in their regional wildlife and habitat 
conservation  efforts.  The group is headquartered at the Audubon
Zoological Garden in New  Orleans  and  provides  direct  technical, 
material, and  financial assistance to zoological institutions
throughout Latin  America.  ZCOG also serves as an important
information, training, and resource clearinghouse by transferring
technical  training  information  and  appropriate technology to zoo
and aquarium professionals in Latin America.  By developing  and 
coordinating  partnerships  among  zoological institutions,
zoo-related organizations, and conservation professionals, ZCOG  plays
 a  critical  role  in  linking  collaborative  zoo  and  aquarium
-based  wildlife  and habitat conservation initiatives throughout the
Americas."