If you're looking for wool, silk, or cotton tapes, braids, and ribbons, I can recommend the Wooded Hamlet. I've bought silk ribbon from them before for some of my reenactment projects (as it seems that nobody in the US carries anything but synthetic trims anymore). You members in Europe probably have better access to this type of stuff at local shops, etc...but I figured I'd offer my endorsement anyways.

The Wooded Hamlet