Jack,
I do a bit of songwriting, but when I do there is always a tune in my head as I write the words. Sometimes then I go back and change the tune but I can't write without it being part of the framework. I don't read or write notes however so I can't be of help there. If you have an air in mind as you write maybe you just need someone to do the notation.
          Cum suas e !   (keep it up )
             Sandy