Dear Mr. Landante,
Thank you for posting your request on History Hub!
Please refer to this History Hub blog post about Alien Files at NARA for assistance in locating your grandfather’s A-File. If your grandfather was still alive and in the U.S. during the 1940s, there may be a name entry in the National Archives Catalog for his Alien Files (A-Files) either at the National Archives at Kansas City (RM-KC) or the National Archives at San Francisco (RW-SB).
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 RM-KC or RW-SB. We apologize for this inconvenience and appreciate your understanding and patience.
If not, an Index Search through the USCIS Genealogy Program will identify any INS records that exist. You may order any records through the same site.
We hope this is helpful. Best of luck with your family research!