Creality Official K2 Plus Extruder Front Cover Kit, Extruded Front Shell Kit for K2 Plus/K2/K2 Pro/Sermoon M300 3D Printer, Black

You don’t mention where you’re situated? For me in Texas USA I can order a new extruder cover from Amazon for $11.98 +tax with Prime 2-day shipping. That’s a quick, cheap troubleshooting swap for me. If that does work I’d then hit Creality up for a spare. https://www.amazon.com/dp/B0DX71VKF3 The K2, Pro, and Plus all use the same extruder, so same part. There is a later version, but for testing this will do.