Rapid led also sells single cob leds on amazon. They are also a great choice for the money.

https://www.amazon.com/Rapid-LED-CXB3590-Light-Fixture/dp/B07BN4RYZT/ref=sr_1_107_sspa?keywords=cob+led&qid=1576426985&sr=8-107-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExSlVBOFBCRjhVS1FLJmVuY3J5cHRlZElkPUEwNDUyNjIyMlFWNzJFTVUzM1pXRiZlbmNyeXB0ZWRBZElkPUEwMTI4NDUyMzlUMjBSTEFaNUszTyZ3aWRnZXROYW1lPXNwX2J0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=