Dicksonia Antarctica

Always plenty on eBay

You might be lucky if at 3 feet you can transplant them. I have done so, but I live in the rainforest, where the thing grows naturally. Mine was just in the wrong place and had to be shifted, if it wouldn't survive, too bad. But after months of doubt and the thing looking rather sick, it picked up and survived and is now twice as tall. But it grows in the shade. It needs shade, especially when young, and a lot of dampness. Perhaps ask for tree fern instead.