Lenovo ThinkPad 12.5" X220 Bottom Case w/Cover Door 60.4KH11.001 04W1416 #3 GLP* | eBay
Amazon.com: Alapmk Protective Case Cover for 12.5" Lenovo ThinkPad A275 A285 & ThinkPad X280 X270 X260 X250 X240 Laptop(Warning:Not fit ThinkPad X230 X220 X210),Black : Electronics
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Bottom Base Case Low Cover for Lenovo Thinkpad X220 X220i 04W2184 04Y2084 | eBay
New Original for Lenovo ThinkPad X220T X230T Tablet Base Cover/The Bottom cover case 04Y2090 04W6945
New Original Keyboard Bezel for Lenovo ThinkPad X220 Tablet X220i Tablet U Frame Cover Case 04W1771 60.4kj11.002 - AliExpress