I literally just ordered a used Lenovo stylus from Amazon last week. It just arrived yesterday and works BEAUTIFULLY, palm rejection and everything, and doesn't have cosmetic damage either. Best of all, it was less than $20.

https://www.amazon.com/dp/B01AZC3HF2?psc=1&ref=ppx_yo2_dt_b_product_details (the used ones are definitely cheaper and seem to work just as well)

This worked great for me.

https://www.amazon.com/dp/B01AZC3HF2/ref=cm_sw_r_cp_apa_fabc_V6OaGbFN7QANQ?_encoding=UTF8&psc=1