Need Help! i can't find anywhere end mill cutter like this

Hello, i'm from poland and sory for my english.

i looking for end mill cutter like this:
IMG_3249.jpg
IMG_3251.jpg
with diameter mounting 4mm and diameter of cutter 0.6mm for cutting in silver and gold. Somebody knows where can i buy it, couse i can't find it in any shops?

Thanks for help,
Paul

Attached Images

• IMG_3251.jpg‎ (28.0 KB)
• IMG_3249.jpg‎ (238.6 KB)