Back to your current problem, I'm afraid that you need to look for other professors instead (you may also keep trying to contact them) because your long draft letters might scare them. Of course, they will never say it. It is better to seek new professors soon wihle do not conunt on those professors. Next time, remember shortening your draft letters for unknown professors.
Anyway, you can count on your laywer any more, he is not qualified at all, believe me. You have to fire him first and then prepare REF by yourselves. What you need to do is write a long cover letter (<10 pages) and re-state (1) your work is in the National Insterest; (2) you are the most qualified to continue this important work and (3) how your work impacts American economy, health community or environment. You may repeatedly use part of previous evidences as well as the new supporting materials. Again, this is only chance for you to present yourselves. If you don't want to wast your money, do it by yourselves. If you can know soemone beside you has successfully applied for NIW, please do not hesitate to ask his direct assistance (he will be better than your current laywer). Show him all of your previous writing and documents and let him improve, revise and change your new cover letter. This is the most efficient for you.
Good luck!