Looking for Golden Rod/Solidago

Some of you will probably ask why, but I've always loved it and I can't find it to buy anywhere. I'm looking for the tall version, Goldenrod "Golden wings" and I have the ideal spot for it at the back of a border.

Willing to pay for postage costs if someone has some and it needs dividing. Anyone?

 

Even seeds would do...of any of the tall varieties.

 

How tall are you classing as tall?

 

Four feet would be great. I believe Golden Wings is the tall one.