I got this one on amazon that worked great! However, it was not purchased with "style" in mind - just that it's big, has a wide brim that covers my neck, and fits my massive dome. I wear an 8 or an 8(1/8) for fitted caps a reference, and this one fits well.
As for looking goofy... it's a sun-hat. It's going to always look goofy!
Gary looks different, but it’s the exact same hat. https://www.amazon.com/dp/B01J1GQ1HY/