social network similar to facebook

I am looking for a well establish company in India in New Delhi (preferrably near the district of Gurgaon) to build a web application similar to “Facebook”. This will be a closed platform 'initially' and will have applications such as events, feeds, etc The team needs to be well experienced in the use of PHP, xhtml and css, MySQL, flash (for HD video) and AJAX technologies. it is desirable that the symfony framework is used to build this web-based application for its multi-lingual capabilities. Experience of building email systems (similar to gmail, hotmail etc) and targeted-advertising (cpc, cpm) systems (similar to google adwords) is advantageous. Search engine optimised. The length of development (including testing) must not exceed 4 months, an associate of mine will be travelling to meet the team in February to work daily (depending on your work schedule) with the team to till completion of the project. Our budget is limited ($1100) but I hope to establish a longterm relationship with the team (depending on quality of this project and the evaluation of my associate) to ensure future developments will be handled by the same team.