Here is another link to another reputable nursery in Austria, I checked Jelitto and Chiltern seeds, they do not list it.
https://www.sarastro-stauden.com/shop/winterharte-stauden/erodium-reiherschnabel/erodium-chrysanthum/
The owner of the Sarastro nursery often travels to the US, I do not know him personally but he might be able to help.
Uli
https://www.sarastro-stauden.com/shop/winterharte-stauden/erodium-reiherschnabel/erodium-chrysanthum/
The owner of the Sarastro nursery often travels to the US, I do not know him personally but he might be able to help.
Uli