class making requests via free proxy servers

i urgently need a class that will perform http requests via free proxy servers and put the response html into a string. prerequisites: 1. must be written in C# .net2.0 2. must use working anonimous proxies - it is your responsibilty to find at least 10 of them (keep them in an xml file or even hard coded) 3. must randomly rotate proxies , another proxy for each request. 4. must work on a site that i need , i will PM interested biders the url. this is very urgent. i will prefer someone who has already done similar projects. max budget 40$ - half an hour job for someone who has the proxies list and done such things before. thanks