I got the mock-ups the other day from The Inner Geek for his Titan. I had to draw them over myself and add a few things so that I can make them double sided as opposed to a regular banner.
It's a slightly different process making a double sided banner. A little more difficult but well worth the result in the end.
If you haven't looked at his project yet, check it out, he's done a great job cataloging his progress for anyone interested in seeing what it's like to build one of these.
My Project Link: Follow my Reaver Titan banner project
Additional FTW Modeling Links:
Making cardstock banners
