Well I've only find seur.com at it says it's 40e to send from Portugal to Germany which is impossible, no way it can be that expensive, both for a 500g envelope and a 3kg box.
If xeroc/ken or someome from germany could also help confirm that it would be great. I thought it would be something around 10/15e at most.ears i
our public mail company charges 23,65 for a package up to 1kg from germany. Which i still think its a lot but they dont mention if it's to send/receive. But that should be for proper packages lol I believe the flyers could be easily sent as multiple "letters" with a few inside. That way only the stamp would be paid. It should be easier that way.
Otherwise I can just print them here if it's affordable.