Hi!
You can get them here: [link|https://www.consolefix.shop/products/replacement-ethernet-port-for-xbox-series-s-x?srsltid=AfmBOooF0K3nVr7PXisz1uZQ5d2KndNJdofOAQhYWp76Ukj-t-FAToDk|Replacement Ethernet Port For Xbox Series S|new_window=true]
And you can also ask them: [link|https://www.ebay.co.uk/itm/225722913549|XBOX ONE S/X ETHERNET PORT REPAIR AND REPLACEMENT PROFESSIONAL SERVICE|new_window=true]
Another way is to buy a broken/donor motherboard and get the LAN port from there.
Wish you a nice week as well, take care!