I have been looking for this plant for quite awhile, but it remains elusive. I have lots to trade, just check my list.
If you don't find anyone here that can trade....
Horizon Herbs (decent but not exceptional Garden Watchdog rating), from Williams OR, has this plant available as a potted shrub.
Richters (not very good Garden Watchdog rating), from Goodwood Ontario, currently offers seed for this plant.
Thanks for reply, I actually ordered one from horizon 2 years ago and I was very disappointed with the tiny, weak plant I received which died right away. I still recommend horizon for seeds, but I likely won't buy plants there again.
I keep my eye out for those from time to time as well. Here's a link I came across for seeds. From Denmark but ships to US.
Here is a link that might be useful: Asklepios-seeds.de