Just designed some Facebook event headers (see below). Depending on content, you can have your own for free, donation or cheap! (Cheap = AU/US$40). Same goes for twitter backgrounds, social media icons and the like.
I'm not usually one to solicit for donations, but a bean's gotta be watered... so...
You can even donate to me via - grrrrrrrrrrrr - paypal. Just use my email. Helps keep the free work coming - supporting political and other prisoners, transparency & anti-war groups, whistleblowers and free information activists with effective graphic design!
Taking bitcoin donations soon.