Create new stylesheet or modify css for mobile access

We're looking for someone who can create a new of add code (via Media queries)to the existing stylesheet of a website to make it more accessable for mobile. The website has a blog ([login to view URL]) and a page ([login to view URL]) We would like to support iPhone (with device-pixel-ratio) and Android both landscape (480) and portait (320). For the page i've created a (very quick) mockup for the portrait version, the landscape can be the same just a little wider... For the blog it pretty straight forward: we keep the with of 640 (because of the movies) but size all the fonts (exept the header) to 150% and move the sidebar to the bottom and put it in two columns. If necessary we can also supply a mockup for the blog. And if needed we can of course change the html on request (add divs etc.).