For those in the UK, Marshall BMW (a franchised BMW dealer) have "Brand New Genuine BMW LED Door Logo Light Projectors Part number 63312414105" on Ebay.co.uk at £25 including P&P.
https://ebay.us/bLnTpw or
https://www.ebay.co.uk/itm/Brand-New...5/254749730186
eBay item number: 254749730186