Hi JMS
Welcome to the Microsoft Community. Thank you for reaching us. We apologize to hear you're experiencing issues with your Surface Pro.
Yes, now a days their is available US plugged charging cord for your Son Surface Pro 8. You can buy this on Microsoft Store "https://www.google.com/search?q=surface+pro+8+charger+port&udm=2&tbs=rimg:CUtzt6WX3uJ9YUh0ApF0_1Cx4sgIAwAIA2AIA4AIA&hl=en-US&sa=X&ved=2ahUKEwjUhJ2LjtiOAxXqRGcHHdSkOI8QuIIBegQIABA9". Log in using your Microsoft Account. Once logged in you can check out the available Surface Pro charger. Make sure to enter the delivery address, then you can check it out and wait for your item to be deliver.
Same on any Online store like (Amazon, Ebay) Amazon has a 65W Surface Pro 8-compatible chargers. Also at any local Stores like Best Buy, Walmart or any Electronic stores.
I hope this information helps. Let me know if you have any other questions.
Warm Regards,
Jansher | Microsoft Community Support