It took me AGES to come up with this. It looks so simple but it just isn't. I started by doing a rubbish version and posting it to the MATS facebook community (Oh thank God for them!), begging for help from all the graphic designers and am so glad I did.
Here's a small and fuzzy version of the first go. The original is lurking in the depths of the trash and I've looked but it's buried too deep to find.