I bought a stockpile of Microsoft Ergonomic Keyboard for Business (LXM-00001) when they were still available, after Microsoft announced discontinuing their peripherals. I hope they’ll last me for a long time. I don’t know if the curved geometry still counts as a traditional layout for you, though. Incase, who acquired Microsoft’s peripherals IP, has re-released them, but apparently can’t keep up with the orders: https://www.incase.com/products/ergonomic-keyboard