Freelancers site

I am looking for script for freelancers (based on PHP+mysql). Functionality can be like basic version of GAF site, with main options like create account, in account options for provider (bidding) and for buyers (post projects, list projects), private messages, list of projects, escrow. All needed features to make this site functional. Thats possible that you aleady have ready scripts for website of this type and it can be an option too. I deliver main templates, design and database structures. Then you don't need to care about design and DB structures just concentrate on PHP functionality. As this project is simple preferred is pure PHP without frameworks. Preferred if GAF developer - frequent freelancing oriented for longer cooperation for future updates and development that will not exit GAF project after week or so.