To be honest, you probably can do a majority of it yourself. It's clear that you support this program and you know a lot about it. Speaking from the heart for such a purpose will go a long way. Once you are done, you can do a quick google search in your area and look for technical or business writers. Not sure where you live, but you can find some that can even work remotely. If nothing else, post the main body of your letter on here and I'm sure a number of us can help you out.
Good luck.





