spare part for peephole door view cam

Hello, I am looking for this product to set up my device, and I wanted to know where I can purchase it since it is not available on your website. Unfortunately, I have checked all possible websites, but none of them have it available in the UK. The available options are being sold at very high and unreasonable prices. The provided link does not work, and I still need this part, which is still unavailable on your website: https://en-uk.ring.com/products/spare-parts-for-door-view-cam Thank you.