For those interested, Amazon has case for iPhone XR,CASY MALL 3-Layers Heavy Duty Hybrid Full-Body Protect Case for $2.39 with code "FD5FBRDY". Free shipping for Amazon Prime users or with purchases of $25+. No reviews but seems to be good enough for a case less than $3. Will only fit iPhone XR!
https://www.amazon.com/dp/B07J5DTNZN