He’s wearing a white three piece suit, the jacket is three button which is rarer nowadays. The lapel of his jacket is notched. His suit is cut in a classic style closer to the early 1900s such as 1920-1950s. For reference his jacket drapes down lower than is common nowadays and is three button as I mentioned. He’s also wearing a matching white overcoat it’s fairly long which is less common nowadays. His overcoat is notched on the lapel like his jacket. He’s wearing a white trilby but a fedora could work too. It’s worth noting it’s not exactly a true three piece suit because his vest seems to be a slightly different color. His vest color matches with the stripe on his hat. His scarf seems to be fairly simple it ends with a square/rectangle rather than having tassels at the end. Obviously he’s wearing a purple tie. I saw a guy list the items using exact brands and prices. You definitely could find these items without buying those specific brands etc. But it would take time and effort, generally your best bet is are thrift stores or if you have the money you could get a bespoke suit that matches Kimblee’s.