I'm not sure if that's a statement or a question .
If it's a statement, congratulations.
If it's a question, then I don't think anyone's created a method for doing it. The biggest problem I can see is that Plesk doesn't open up the format of their backup file.
Is this a request for a custom script to be written for you? We could do it, but it would take time and it would be expensive, because it would be a custom job, and it would take time because we'd have to write a backup system as well as a restore system.
We were Plesk Gold Partners for two years, so I'm sure we could do it, but it would be quite a bit of work.