If you can put the eucalyptus on the grapevine cones, I'm sure you could make the cones yourself. I've got a grapevine and when it's green and growing, it's easy to shape it any way you want to. Take the leaves off -- it'll dry brown I've made wreaths and things with it. You can find wild grapevine all over the place, ewen in the suburbs. You could probably get a sytrofoam cone shape and use that to mold the vines around.