One of the stars and part of the blue canton are on display at the Fort Ward Museum in Alexandria, VA. A small piece of the flag is in the Gen. Lewis Wallace Papers of the Indiana Historical Society in Indianapolis. Wallace raised the 11th Indiana Zoauves and knew Ellsworth from before the Civil War as the Chicago Zoauves traveled the country in antebellum times. There's other small pieces of this flag out there as well.
Greg Biggs