Thank you. I was so relieved when I got an email back from them confirming that they still had some in stock. I wouldn't have thought to email them either but EGBDF suggested another member to email Longchamp about a strap. EGBDF had previously reached out to Longchamp about ordering a replacement strap. I was fully expecting them to renege on their word. So a quick shout out to
@EGBDF \because she shared her experience on this forum. It was a quick process. And since I knew they would be asking me about the tags, thanks to EGBDF, I took a photo of the bag for reference and a photo of the plastic tag on the inside.