Status of AlarmDecoder availability

I have seen online in numerous places that AlarmDecoder would be the perfect interface for my alarm system. Unfortunately, as of the end of December 2024, I cannot seem to find it for purchase, new or used. The website seems to have transformed into a generic website with links to alarm companies.

Does anybody know what happened to AlarmDecoder? Can it be purchased anywhere? It seems like a great product.

Moving forward, are there any suitable alternatives? The only one I found was EnvisaLink, which seems to be more limited, and requires a third-party website. I don’t really like that idea.

Are there any DIY alternatives, such as making an interface yourself using Arduino?

Thank you very much for your help!