HS has a good selection of what you are seeking. (I won't even try spelling it). The nice thing about HS is you can order the scarce species early then add to the order later before shipping time. He will combine the shipping into one order.
Edit: I should have checked before commenting. His current online catalog doesn't have Molly. I must have remembered it from previous listings.
Edit again: I was looking for the wrong name. He lists 3 Paeonia daurica mlokosewitschii
Picotee form $75
Pink form $65
Yellow form $100
