Automated security file downloading needed

I need a script (on server: Centos, or on client: Windows) to download the AutoSSL Let's Encrypt private key and certificate files for a list of domains I own, so I can update my local development computer whenever cPanel decides to renew my webserver certificates, making them invalid locally. I don't know enough OS script language to do it myself. To the best of my knowledge, cPanel and WHM won't do it, my VPS hosting company has refused to do it, and the Web doesn't have any postings showing how to do it. I'm wondering if there is any expertise here in this forum to do it. The script would take a list of domain names are corresponding local file paths and would download the private key and certificate files for each domain.