Create a Wordpress Plug in and Template

We provide event software where there are shows (such as films) and then performances. Many of our customers create websites to connect to our event performance software. We would like to provide an 'off-the-shelf' solution for our customers to have good looking websites without needing to every time create it from scratch. We are looking for a company that will: (a)Create a complete wordpress plug-in that takes a json feed of data (that already exists) and stores this data inside the website, then allowing customers to view the performances as a list, selecting the day and the layout that suits them. - Include appropriate admin screens for importing fresh data and administering the settings of the plugin (b)Create a widget that allows the customer to choose: (i)Location/name of the venue (from another json feed) (ii)List of shows (from the json feed) (iii)Day of the show (iv)Redirect to the correct page for that event (c)Create a wordpress template that showcases all of the information into a really good looking website, including displays of the images that are referenced in the feed. Look at movie theatre websites for examples. This must look like a very nice, fully finished website, but also be themeable so that we can easily offer it to other clients who would like a different look and feel. (d)Handle google analytics within the site properly so that customers' behaviour is tracked. At the point of 'purchasing' tickets our own website will be included as an iframe. We need to receive the appropriate cookies for google analytics. (e)Although we anticipate having more projects to work on together in the future we would also need the complete set of code and instructions at the end of the project (so that we can publish the plug-in and add the code to our repository)