We do have an option under build while you are editing a campaign. If you scroll down to see our Layouts section there are some boxes with outlined built into them that you can use However, if the border is not as thick as you'd like we would not have a way to make it larger in our editor.
As a temporary workaround, I used the Build function. I dragged and dropped the light bordered double image with text underneath. Then I deleted the parallel images leaving a double column of text with a light border. Bit clunky, but it worked for creating an easy form for clients to complete and reply to.
I am glad that worked! I do apologize that it required some extra steps to get there but we are happy that our layouts provided an easy option for clients to complete. Thanks!