I know the Briggs & Riley International Carryon is wider and deeper than the domestic - 21” tall / 15” wide / 9” deep
You might be looking for a unicorn since the bag companies would be selling something small that’s technically not carryon luggage.
My guess would be your beat bet is going to be a to look around at a TJ Maxx or Marshall’s for something that’s not carryon compliant and has been discontinued.