I added a new mail form to contact a project owner to the Plone add-on tdf.extensionuploadcenter yesterday. This new feature made it to the new release of this Plone add-on which I published on the Cheeseshop (https://pypi.org) today:
It is published with the release number 0.49.
The source code of the add-on is available on Github:
And here some screenshots of the new feature:
This Plone add-on (former release) is driving the LibreOffice extensions website https://extensions.libreoffice.org. The new release of this add-on could be integrated into the website by running Buildout.