edu gov backlink

I am looking for 50 quality, permanent high PR .EDU and .gov verified backlinks for websites Link must be : 1. Alive at least for 1 month otherwise you have to replace. 2. All must be from US Based sites [login to view URL] must be from websites with PR4 or higher. 4. All must be dofollow links. 5. Must need to be done manually, I can easily check it. 6. Must need to be done 24 hours after hiring otherwise