Drupal modules

Hi is there anyone out there skilled in writing drupal modules (you must have experience and must already have published or contributed something to the drupal forum which was shared with other users)... The situation is this, we have a website in Drupal, we have created the templates - there are some quite large bits of functionality which we need written in MODULAR STRUCTURE and to be committed to our repository (we use [login to view URL] make sure you are familiar with this) We need you to be skilled in - once I give you the specification (this is a project that works on a different platform so we can walk you through the steps required) for each module - you will tell us approximately how long it will take and how much it will cost... Then we will agree on the cost and timing and if you do it within that timeframe then it's yours... You will be penalised for late submissions though, please be aware of that.. Any questions please feel free to ask