Here's a link: https://www.amazon.com/Kensington-SD4750P-Docking-Station-Adapter/dp/B07ZHT56SQ?th=1
This is a used but great condition dock - Kensington SD4750P. Supports 2 4K monitors over Windows from my experience, and supports 2 monitors over Mac as well depending on your model, but make sure your software allows DisplayLink (some remote technologies like Citrix do not!). Provides up to 85W to your laptop which is enough to meet most non-gaming laptop needs.
$75 cash or Venmo. It's available, save that question. Reach out with other questions.