Write Letters of Reference for Immigration Petition (EB1)

I need someone who can help draft letters for a US Employment-Based Immigration: First Preference EB-1 Extraordinary Ability petition. The petition will help demonstrate that a particular individual has extraordinary ability in the sciences through sustained national acclaim. I need 4 letters required in total. Each one will be 2-3 pages. The people signing the letters do not have the time to write it themselves so have asked for sample letter wording to be provided to them so they can think through what they want to write. It will be desirable for the individual to have knowledge of US immigration law but this is not mandatory as an attorney will actually be doing the petition filing. Each letter will need to be well-researched and cover specific areas. The work is on a tight timeline and we will need to finish it within 2 weeks of starting the project.