A good start for your search can be found at the NAVSOURCE website, which has a page for submarine chasers:
The craft are listed by hull number; most hull numbers have images associated with them.
I hope you find this information useful.
Thank you, Alex. But, they own the copyrights to those photos. I am doing a book on the craft.
Dear Mr. Connelly,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located 42 series in the Records of the Bureau of Ships (Record Group 19) that may include SC-1 and SC-497 Classes of Sub Chasers. For more information about these photographs, please contact the National Archives at College Park - Still Picture (RDSS) email at firstname.lastname@example.org.
We also located 31 series in Record Group 19 that may include ship plans and/or engineering drawings of the SC-1 class and SC-497 class. For access to these plans and drawings, please contact the National Archives at College Park - Cartographic (RDSC) via email at email@example.com.
In addition, we located 72 series of the Bureau of Construction and Repair in Record Group 19 that may include records regarding the SC-1 class. For Information about these records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org.
Next, we located the series titled General Correspondence Filed Under Filing Classifications S1 to VZ, 1940 - 1945 in Record Group 19 that may include records regarding the SC-497 class. For more information, please contact the National Archives at College Park Maryland - Textual Reference (RDT2) via email at email@example.com.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDSS, RDSC, RDT1, and RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
Finally, the Naval History and Heritage Command may have useful information.
We hope this is helpful. Best of luck with your research!