The most of them are located in the Netherlands. So far those shops are the most usefull stores for me. I find them very useful to share, this is either due to their location, their great services, collections or their reasonable prices.
On Etsy.com you can find so many suppliers all over the world, It's too much to mention. So just surf on etsy, try several keyusers. The chance is very big that you will find something you need.