Amazon.com: New AC DC Jack Power Plug in Charging Port Connector Socket with Wire Cable Harness Replacement for IBM Lenovo Thinkpad T520 T520I T520S W520 : Electronics
Docking Station Port Replicator IBM Lenovo ThinkPad USB 3.0 T520 T530i W530 DOC3 | eBay
New Lenovo ThinkPad T520 USB 3.0 Docking Station Port Replicator + AC Adapter | eBay
Lenovo ThinkPad W520 Mobile Workstation Details, Specs and Photos (video)
New USB Lan Port Board Board For Lenovo Thinkpad T520 W520 3.0 USB 04W1563 | eBay