Large Post Card for Ruby theme

I’ve been using Casper for several sites and love the .post-card-large class for the first post on the homepage.

I’m now working on a different site and using the Ruby theme (which I believe is built on Bootstrap). Does anyone know if someone has recreated the large post card design for the Ruby theme? I’m sure I can refactor/rewrite it in CSS but didn’t want to reinvent the wheel.