I bought these on amazon because I was having the same issue! They work pretty well!

MOLDERP Silicone Eyeglasses Temple Tips Sleeve Retainer, Anti-Slip Round Comfort Glasses Retainers for Spectacle Sunglasses Reading Glasses Eyewear, 10 Pairs (black 10) https://www.amazon.com/dp/B07B6K9SZQ/ref=cm_sw_r_cp_api_glt_fabc_92PF0PQHVJ67B8KB8HE7?_encoding=UTF8&psc=1