Hi Phil. There are plans in Drew Langsner's 'Green Woodworking', I think its available in paperback now, or at most libraries. Also, I can't seem to find my Woodwright's Shop books, but there are plans for a rake at least in one of the books. If I can find my books (storage room somewhere) I'll try to scan the plans and email them to you. See you in a few weeks.
Phillip