Include templates in our webhosting service. Licensing doubts

Hello!

We are starting a niche webhosting service and I’d like to offer our customers to simplify them the installation some of the templates available in themeforest for their wordpress / prestashop / moodle websites.

What is the legal way for doing this? e

  • selling them the template automatically and pay themeforest.
  • installing the theme after their proof of having bought previously in themeforest.
  • Any other way?

I’ve tried to locate a support email for discussing this in envato but couldn’t find it.

Any hints?