I've been searching for months for a proper hanger for them and finally decided to do it myownself. I went to the hardware store yesterday and got some fairly serious wire (18, 15 and 12 gauges, I think) and started wrapping. I worked on it in a couple of sessions yesterday in between Kid Duties and trying to organize my fabric stash.
I wore gloves for most of the wrapping, but my hands are still a bit torn up; and my wrists look like I walked into a herd of feral cats with a dead fish and yelled "suppertime!"
I think I'll make a smaller one for my daughter's tiny-leaved ivies; they want support and it'll be more fun than the ring or sphere I'd originally thought of making for them.