css required for iphone 4

I have a website which uses media queries to serve correct css to different devices. So far I have CSS files which make my website display perfectly on desktops & mobiles (480 x 800). I need some new CSS written so that it displays perfectly on the iPhone 4 (640 x 960). This will be a very simple job for anyone who is an expert at CSS for mobile and has an iPhone 4 because most of the work is done. You may only to change some width & height values! YOU MUST have a physical iPhone 4/4s so I can see completed screenshots. Please DO NOT BID IF you plan to use an online iphone emulator. Maximum budget $150