One possible choice for the Catalogs would be RLIN
(Research Libraries Information Network). The collections
available on RLIN are of a scholarly nature. In addition
they carry archival collections, for example; the Maryland
State Archives have several record series on RLIN. I
do know that Maryland did not pay for RLIN. While it is
available over the Internet it does require an account.
RLIN's telephone number is 800-537-RLIN.
Michele Skinner, Librarian
NASA/Goddard Space Flight Center