The Renault Dauphine blueprint was published in Polish magazine for modellers,
"Modelarz" in issue 12/1964. You can buy it from time to time on Allegro (Polish auction service - Allegro.pl - aukcje internetowe, bezpieczne zakupy). If it is a problem, please let me know, I'll try to make a copy on the digital xero for you and sent it by regular mail.
Regards