This is a tricky question, just wondering if anyone has a work-around.
Is it possible to give away one free accessory with each order, rather than one free accessory with each item? So someone orders item A, they get a free accessory. Someone else orders 2 lots of item A, they still only receive one free accessory. With bundling, you would get two free accessories in the second situation.
Maybe someone has a clever idea.
P.S. I don't envy you guys at Smith Consulting - some many types of order combinations.