Contextual Link Building Service(repost)

Need contextual link building service. Requirements: - links must be related to provided urls - links must be dofollow - links must be within unique content - must be a quality site with more than 500 pages indexed - no more than 10 outgoing external links on the page. - no article directories - site must not be your own network or link farm. - English sites only - if you provide commenting services, comments must be unique and at least 50 words.