Build an Add-On plugin for WP Bakery's "Visual Composer" Plugin. -- 2

Hello, This job is to build an AddOn plugin for WP Bakery's "Visual Composer" Plugin sold on ThemeForest [login to view URL] There is a default element called "Post Grid" - it allows for a list of posts to be placed in a page row/section the VC Page builder. The current "Post Grid" item allows for a link to navigate to the post. This Project is to create a stand-alone Add-On Plugin that allows the full content to be displayed in a Pop Up "light box" window (just the main article content that is built with Advanced Custom Fields) - There is already a drop down option for "Link target" (either same or new page" and this is where I need the new "Show In Lightbox" option to appear" (see attached image). - If the new "Light Box" option is selected by the user a second set of options appear: - "Width" - with a field to enter a width in pixels for the lightbox. - "Height" - with a field to enter a height in pixels for the lightbox. - "Show Scroll Bar" - a check box that when ticked shows a scroll bar on the pop up window. I have an existing site that I can show you how the functionality works (different CMS) - PM me for that link. I would very much like to have this as a "stand alone" "add-on" plugin without editing the the core code of the original VC plugin so that the VC plugin can be updated to new versions easily. Need in next 2/3 days. Thanks for taking the time to look at this - PM me if you need more clarification. Thanks, Jakson