I get back to the Plone add-on collective.templates during the last two days and added especially a new improved form to directly contact a template project owner by email. This new form is linked from every project page yet.
There is also the former email form available, which is linked from the sidebar of the template center yet.
I updated the localization of the add-on and made a new release today. The release (version 1.1) is available from the cheeseshop (https://pypi.org): https://pypi.org/project/collective.templates/
You can download the source code of the project from Plone collective repository at: https://github.com/collective/collective.templates