In a rush, I made these last night. One is a proper banner ad:
And the other is more boxy, for a display ad:
I'm kind of shocked that I modeled that jar, but it has ended up being *so* handy. These were not totally seamless to make (I went from Inventor .iam -> Inventor .ipn -> Inventor .idw -> export as .dwg -> AutoCAD -> export as .pdf -> Illustrator), but they could have been much worse.
The taglines & formatting were tough, and I'm still not totally convinced they're perfect... but for a few hours of after-work hacking, I think they came out pretty well.