When I had my notes to use on a product, I noticed something in the “you may also like” carousel they do at the bottom of the page.
At the bottom of the page they give recommendations to other Soundcore products. It was here that I noticed several of the replacement items that @Hannah had a thread on and that you could contact service@soundcore.com to ask about.
Here are several items that I have seen during my search that you can buy from the Soundcore site:
There seems to be a handful here and I was wondering if there was a better view of those replacements.
So I too off part of the address to the one below.
From here you can go to headphone accessories and it will show all of the parts that are for sale.
After another look around, I did eventually find the link under support for headphone accessories and it will give a full list of items currently on their Soundcore site.
So if you need it for yourself or as we may help others, I thought it is nice to know it is there if needed (and not having to contact Support for those particular items).