Green dianthus seeds?

I am seeking a source for Dianthus Barbatus seeds. Must be green 'flowers'

 

I would guess a very low chance of acquiring this as seed, see:

Growing with plants: A Trick Around Growing 'Green Trick

That article is 7 years old, though, so perhaps there are people out there with it in their gardens by now.

 

Thanks: I wonder whether these even produce seeds, or perhaps have to be cloned...The article's suggestion of 'Amazon Neon" is a creative suggestion, but not a very satisfactory substitute... I don't think the situation has changed much in seven years.
Wilma