Looking for a laptop power supply for a Lenovo Thinkpad X220. They are typically rated at 20V and have a circular (barrel) plug into the laptop. It's a bit of a long shot, but I will take one if you have it. Photo shows an example including the barrel jack.
(Updated from previous posting as do now have a docking station thanks to a generous freegler)
Laptop power supply (Old Walcot SN3)
This request has been satisfied by someone and is no longer needed.