160989 Alexa rank 20k or better

I want our website, which already has pr5 in google and 100k Alexa ranking (and getting better fast), to have a constant 20k or better ranking in Alexa. It should be done in any legal way (we do not want to get black listed in SE). We need this to show our clients that we are big and popular. We do not care if the visitors are real or not. Please let us know in broad terms how you are going to achieve this goal. Please let us know the extra price if you can achieve greater than 20k result. Any additional SEO skills are a bonus. Thank you. PS You must have 5 or more successfully completed SEO projects in SL.