Create Social Media site graphics/backgrounds/etc

Hello! About 2-3 years ago I had someone design some social media banners/backgrounds/graphics for our social media sites. Since that time those sites have changed their requirements and such and not all our graphics fit anymore. On top of that we just launched a new website earlier today and most of the current graphics do not match our new site/theme anymore. Basically we need the various graphics/backgrounds/etc made for YouTube, Twitter, Facebook, Google+, Pinterest and LinkedIn (I know some of these only allow and small single graphic but still). This project is to make ALL of these backgrounds. Should be easy work for an expert. Also MUST include samples of previous work making backgrounds for social media sites, I do not what to see a whole portfolio or a million links, but a few actual samples you've done, thats it (and feel free to include any mock sample if you would like). Will send website link (that has links to our current social media pages) via PM (so please ask for it). When I got these done before I paid under $50 or so...and I'd like to stay in that range this time too. Must speak fluent English and be available through IM/etc. We will own all the rights to the graphics that are designed and accepted. No payments until project complete! I think that covers it...any questions just ask!