You can install a free trial of ISPmanager Business on your server and test it for 2 weeks. The Installation Guide can be found
here
If you wish, you can provide us with root access to your server (the server should run CentOS 6.7 or Debian 7,
, and we install the panel for you.
By the way, you don't need to order a trial somewhere, it will get activated automatically, once you run the installation script
A trial version has the same functionality as a commercial one, so you will be able to evaluate all its features.