The records of the U.S. Commerce Court are included among Record Group 172 at the:
National Archives at Washington, D.C.
700 Pennsylvania Avenue NW
Washington, District of Columbia 20408-0001
General email inquiry address: http://www.archives.gov/contact/inquire-form.html
A published description of the records is available in the Guide to Federal Records in the National Archives of the United States, 1995 (http://www.archives.gov/research/guide-fed-records/index.html ).
Dix, George E. "The Death of the Commerce Court: A Study in Institutional Weakness." American Journal of Legal History 8 (July 1964): 238-260.