My impression is that the tail lights are specific to the trim level: XL, XLT, Lariat, King Ranch, Platinum, Limited, etc. My 2019 F350 XLT has bulbs but I see Super Dutys with LED tail lights. Also, I doubt that you can buy anything but the entire unit. Maybe I am wrong. Two screws on the inside release mine to pop out of the two mini sockets on the outside. Good luck.
There are many dealers that sell OEM replacement parts when you search online. My small town dealer was forced to close because they would not install charging stations. I recently used this dealer with good fast results for tailgate bump stops: https://www.wholesalefordpartsfast.com
Rick