Original and New for Lenovo ThinkPad X220T Base Cover case/Bottom cover 04Y2089 - AliExpress
Removal and installation steps of DC-in connector, base cover, fan, digitizer pen case, and pen switch assembly - ThinkPad X220 Tablet and X220i Tablet - Lenovo Support US
One of my x230's final upgrades - a 1TB mSATA drive : r/thinkpad
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad X220 4287, 4290, 4291 Ddr3-1333 - A13 at Amazon.com
Crucial M4 SSD Thinkpad X220 7mm Mod | I decided not to put … | Flickr
SSD Upgrade for Lenovo ThinkPad X220 Tablet 256GB/512GB/1TB/2TB | eBay