Most test publishers prefer to sell directly to a test administrator, not to libraries. Ordering information--publisher, address, price--can be found in EBSCOhost in Tests in Print.
There are a few collections of commercially-published tests on campus, for examinaton by qualified students and staff. Inquiry at these offices:
Counseling Center (Bowman Hall)
Education, School Counseling, School Psychology Dept. (Human Services Building, 4th floor)
Rehabilitation and Counseling (Vocational Rehabilitation Building, 3rd Floor)
Instructional Resources Service (321 Library, 3rd Floor)
Tests in Microfiche. The University Library keeps this sampler collection of tests on microfiche from the Educational Testing Service on the second floor in the Periodicals section. TESTS IN MICROFICHE