If the job its still available i would like to open my services for you and your clients.
I am doing SEO for a time ( don't like to mention like other "Doing seo for 5 years" and they don't know what is Do follow ), and updated my skills as Google did with its own algo.
So, to sum up things lit bit, i want to say that i am focusing just on quality links, manual done, and content creation.
I think you are not interested in tons of services, that may lead to penalty, or other problems for your clients, and go for quality.
Some of the links that i do are:
Contextual links - Step by Step
Relevant Blog Commenting
High Pagerank Backlinks
Manual Link Building
Examples will be provided.