Implement ASP.NET MembershipProvider and RoleProvider for PostgreSQL

I'm looking for somebody who will implement membership and role providers that use Npgsql to connect to PostgreSQL. Sample implementations (for MySQL, for example) can be found on Internet. Try [login to view URL] There's also sample implementation on Microsoft site. You need to provide: a) source code in C#, b) text file with CREATE TABLE statements for PostgreSQL, c) the code needs to conform to the best practices (closing connections etc.). You must: a) be able to issue an invoice, b) bid below 60 USD.