Anyone Growing Goldenrod Commercially?

Do you know anyone that is commercially growing goldenrod and distilling it?

No, the markets for the herb and oil are so limited as to probably be less than 2,000 lbs. domestic. Finding a buyer might be almost impossible. Those who wanted it for some application probably would just go out and get it for themselves.
The primary allergen markets use the local honey and Propolis, rather than inflicting flowers from various weeds. It is consider noxious (cattle don't eat it), so even to wildcraft it would require a special permit (Noxious Weed Control Board).