I think that there are a couple of people selling the bare roots on eBay. Not sure if that helps at all ?

Thankyou, I'll have a look.

Ginellie only just seen this, I have Helianthus Lemon Queen and will happily send you a piece, just PM me with your address and when the ground dries up a bit (like a swamp at the moment)will dig you a piece up, will soon spread around as its quite rampant :-)

Thank you Simbad, I have sent you a PM. G