I have some names...I think 1 or 2 are repeats from Cincy's. Hope this helps.
May have more to follow


Labs:
Brookline Labrador Rescue covers most of PA, I think -
http://www.dogsaver.org/brookline/. They probably have ideas of the
rest of
the state if it IS out of area

Also Lake Erie Labrador Retriever Rescue MAY be able to help if the dog
is
in Western PA http://www.lelrc.com/LabRescue.htm

Goldens:
Keystone golden retriever rescue (northwest PA) -
http://www.kgrrescue.com/

Golden Retriever Rescue of Central PA - http://www.grrcp.org/

Delaware Valley Golden Retriever rescue -
http://www.dvgrr.org/golden_hotline.html