Magento modification

General information for the website: Magento script modification
Kind of development: Customization of existing website
Description of requirements/features: Magento 1.92 CE ecommerce website using the defailt RWS theme built into magento

We need our magento site mofiied so that we can choose for each category if out of stock products are shown or not

A possible Method guide can be found here : http://stackoverflow.com/questions/12401389/magento-how-to-show-out-of-stock-in-one-category-only-while-hiding-them-for-all


REQUIREMENTS

* Out of stock products hid only on selected categories
* Layered navigation product count to reflect products shown in specific category (i.e. not count out of stock)

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Also remove out of stock products from search results again with updated layered navigation product counts

possible method here: http://stackoverflow.com/questions/27021228/hide-out-of-stock-products-only-in-search-result-pages

An ideal solution would have an option to show / hide out of stock products option available to be selected on website frontend with the default option as hide out of stock products

Perhaps on the search results page - top of layered navigation column

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We require updated files only with a guide to where they need to be uploaded to - no server access will be given as not required
Extra notes: