I have some fresh, wild-collected seeds of 
Pulsatilla patens from the Calgary area, to give away or trade.   
I also have seeds of 
Townsendia leptotes, and will have a lot of 
Pulsatilla vulgaris - from medium-to-dark purple-flowering plants - before too long (though, whether this is carrying coals to Newcastle, I don't know!  

)
Please send me a personal e-mail, if you are interested in these.