https://www.amazon.com/Lenovo-connectivity-Configurable-Compatibility-GX80N07825/dp/B0762M2QF7/ref=sr_1_3?ie=UTF8&qid=1548886215&sr=8-3&keywords=lenovo+active+pen
This one works
Adding Amazon link - https://www.amazon.com/Lenovo-connectivity-Configurable-compatibility-GX80N07825/dp/B0762M2QF7
Lenovo Active Pen 2: https://www.amazon.com/Lenovo-Active-Levels-Pressure-Sensitivity/dp/B0762M2QF7