Write Windows Phone 8 renderers for Xamarin Project

I have a Xamarin project that should be delivered in Android, iOS and Windows Phone. Android and iOS versions are done, I need someone to implement Windows Phone rendering for some Xamarin screens which are: Maps (with customized image pins) and another page with a few controls. I need the buttons on windows phone version to be able to show text (on left side) and image (on the right) and to have rounded corners. Bottom line: I need maps to be working on Windows Phone and another screen with entrys and buttons (that should show text and image with rounded corners)