Get an old thick leather belt and buckle it around the hub. Then chainwhip the cog and hold the loose end of the belt as tight as you can in the other hand. Worth a try at least.
If you happen to know a friendly mechanic, he might have an oil filter strap that you could borrow. Won't damage the hub in any way and will definitely be strong enough to remove it.
Get an old thick leather belt and buckle it around the hub. Then chainwhip the cog and hold the loose end of the belt as tight as you can in the other hand. Worth a try at least.
If you happen to know a friendly mechanic, he might have an oil filter strap that you could borrow. Won't damage the hub in any way and will definitely be strong enough to remove it.