They're bonded in, I managed to find one on eBay. Contact this chap on this listing called Julius. I've bought various bits from him for my c5.
https://www.ebay.co.uk/itm/163720125396?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=J_mXsPy2Qdi&sssrc=4429486&ssuid=IE07kO4STZy&var=&widget_ver=artemis&media=COPY