FTP Scanning for Business App Rules

Hello everyone

I am trying to find a way to provide AV scanning FTP uploads to our FTP server using a business app rule.  As it stands, you can only do this on user/network rule and would really only apply to users downloading from an FTP site. My goal is to prevent infected uploads to our FTP server if possible to help keep it clean.  It has AV running on it but if I can stop this before it gets to the server that would be even better

Thanks!