For more than twenty years, the Hermès Birkin bag has been the iconic symbol of fashion, luxury, and wealth. With a fabled waiting list of more than two years to purchase one, the average fashionista has a better chance of climbing Mount Everest in Prada pumps than of possessing this coveted carryall. Unless, of course, she happens to know Michael Tonello. . . . With down-to-earth wit, Michae…