Amazon has 303 UV aerospace protectant Spray 32 oz bottle for $8.07 as a one time purchase or $6.86 with subscribe and save
303 (30313-CSR) UV Protectant Spray for Vinyl, Plastic, Rubber, Fiberglass, Leather & More – Dust and Dirt Repellant – Non-Toxic, Matte Finish, 32 Fl. oz
https://www.amazon.com/dp/B00KN0UOEE