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Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the series Coast Guard Vessel and Craft Engineering Plans, 1885 - 1994 in the Records of the U.S. Coast Guard, 1785 - 2005 (Record Group 26) that may have the blueprints you seek. For access to and copies of these plans, please contact the National Archives at College Park - Cartographic (RDSC) via email at firstname.lastname@example.org.
We also located logs, photographs, muster rolls, and patrol reports of the USCGC Duane. For access to and/or copies of these records, please contact the reference unit indicated in the Catalog.
We hope this information is helpful. Best of luck with your research!