Lost my left earbud

I lost my left earbud, can’t find a replacement anywhere!!! What can I do to get it replaced? Another issue, they were a gift. I have no receipt to show my proof of purchase and neither does the original buyer, who originally purchased them at Walmart.

Help!! Or if anyone has a right earbud they are no longer needing that I can sync up. I’m in Georgia, and I’ll pay the shipping.