Dear sachag,
As Tienhc said, you can download the Teline III package and on unzip, you can take the mod_janews2 zip file and use it.
The modules which are used in multiple templates are packaged with the template downloads, we do not list them separately for downloads, or else it would be difficult to manage the inventory of downloads as whole. However, be assured, whenever we update a module code, it is updated universally in all the template packages.
Regarding mega menu, it is embedded with the T3 templates, only teline III has the mega menu module, which also will be replaced soon. You may be looking for the JA menu extended parameters plugin, which adds functionality to the mega menu, again ,the same plugin can be found in the extension folder of any T3 based template.
The whole download system is going for revamp and it would be far easier then on, the video preview of the new system is coming up shortly.
Since, the users usually use the template packages, currently we package the extensions (module / pugin) used for that template within the template package.
Also, remember the backend optimum settings for any module is different for each template, if you plan to use the modules on other templates, you will have to tweak the backend settings properly to get the functionality.
Arvind