Clean up and Add Features to WooCommerce/Wordpress Plugin

We need a skilled WordPress developer that can quickly add additional features to one of our WooCommerce plugins to get it ready for the market. The plugin we have is a return (warranty) authorization plugin. It allows customers to request returns of their purchases, and allows store owners to keep an audit trail of returns including return #'s and shipping numbers. We need to add a feature that will allow the admin to define a warranty period for a product, so that after the purchase is completed they "request warranty" button would only be active for that period of time - after which a link would simply say "warranty period ended." We also hope that the awarded developer can review the plugin to ensure it works with WooCommerce 1.6.6 AND 2.0 (in the Woothemes Github repository), can review code to ensure proper standards are used including the use of $wpbd instead of mysql_ statements, ensure that proper tables are created on install of plugin. We also need the admin to be able to create default questions that a customer might need to answer (radio or select boxes AND text fields) as to reasons they are requesting a warranty (this would be setup in the admin screens for the plugin, and displayed to the user and required for submitting warranty requests).