Add the following code to 'Works Best with Reflective' layout (Design | Library | Layouts | Web Page Outer Layouts). Put it just after the 'Reflective New Products List' variable:
This will display it in the same style as the 'Best Sellers' and 'New Products' boxes.
Replace 'MY HEADING' and 'MY TEXT' with the relevant contents for the box. Alternatively, you could create variables (Design | Library | Variables tab) for these items and enter the data in the appropriate field in the interface.
HTML Code:
<h3>My Heading</h3> <div class="reflective_sidebar_marketing_box"> My Text </div>
Replace 'MY HEADING' and 'MY TEXT' with the relevant contents for the box. Alternatively, you could create variables (Design | Library | Variables tab) for these items and enter the data in the appropriate field in the interface.