How to get event & other promo cards

[Eldarwen]

I've been looking all over the forum but I can't seem to find the answer to two of the most burning questions I have.

How on earth can you get those special cards, coins, bookmarks etc. when you live in the Netherlands?

And I just got loads of Munchkin games & expantions for x-mas & just bought some but didn't get any free extra cards. Did I read it wrong on the site where they say "Find them at conventions or your local game store" cause I didn't find them.

Please help