Amazon.com: BoxWave Stylus Pen Compatible with Lenovo ThinkPad Yoga 11e (5th Gen) (11.6 in) (Stylus Pen by BoxWave) - AccuPoint Active Stylus, Electronic Stylus with Ultra Fine Tip - Metallic Silver :
Lenovo Active Capacitive Pen Pro For Thinkpad 10(20e3 20e4) P40 Yoga P50 P70 X1 Tablet X1 Yoga Thinkpad S1(20jk 20fs) Yoga460 - Tablet Pen - AliExpress