Oups, sorry, as too often I forgot the straight forward solution! Sooo French…
You can try to reach what they call Aventure Peugeot. Quite recently, they opened a classic department to sale parts and so on (in fact to try to Promote their 208). You can send an email to:
aventure-peugeot@peugeot.com
If my memory serves - you never know!- the danish subsidiary has always been considered as "advanced". May be because with such a high tax rate on imports its quite hard to sell new cars there.
If you like a bad but free translation in so called French, let me know by PM. But only from English to French, my Danish is rusty (forgot it at Tivoli or Valby).