Every Section and Element and every Add-On in Vev is created using the Vev Code Editor. You can fork the source code for these widgets and modify them to your needs. When you duplicate the source code
Open the Code Editor
Click the folder Icon to open a package
Click the tab named "Public" on the left side to open a list of all public packages
Browse and find the Element or Add-on you want to fork and open the package
Click on the Fork icon in the Top Bar to copy it into your current project.
If there are several elements in the package, select one and click next
Save the Fork to your own project package
The source code is now your own to use as you want!