Dear Mr. Kelly,
Thank you for posting your request on History Hub!
Since the most likely images of the piano photographs you are seeking may have been from the NYC Hollywood Theater premiere of Rhapsody in Blue in the summer/fall of 1945, we suggest that you search the Theater Historical Society of America - Archives for information or submit a request to them.
Also, historical newspapers may contain photographs of the piano and may be searched using the New York Public Library’s Articles & Databases web page.
We hope this is helpful. Best of luck with your research!
Hi Mr. Kelly , You might try the Chickering Foundation. Their link is here:
Also the Library of Congress might have something.