Yup got one from Amazon that works with them. I'll attach a link. I bought it for under 200. Make sure it's from Amazon basics. It's 172 right now. Hardly any water gets in the bed. The thing is awesome!!

Check this out on Amazon Amazon Basics Soft Roll Up Tonneau Cover for 2014-2019 Toyota Tundra, Fleetside 5.5' Bed https://www.amazon.com/dp/B087QM1WWC/ref=cm_sw_r_apan_glt_fabc_CPP4EM7D294G99XDQ6RR?_encoding=UTF8&psc=1