Duplicating Content Groups Within A Node

Is there a way to duplicate a content group within a node?

Here's what I'm trying to do:

On my main page nodes, I want to have specific sections within a content group. These content groups would include:
1. Section Title
2. Section Body
3. Image with Cutline
4. Downloadable Files

I'd be able to click a button and the content group would duplicate itself?

Now, I could create 6-7 of these separate content groups, and it would work fine - but I was wondering if there was a better way to do this - ?

Right now, it's just one big node and I have to apply

<

h3> codes for section titles and manually hardcode links.

If anyone has any suggestions - or a way to do this that I'm not thinking of - ?

Thanks!