I am working with microfluidic system for my scientific research and I need a metal master mold. The pattern of the master is like a stamp which has a couple of tiny bars on top a base. The width of the bar is 0.1mm and height is 0.5mm. I am thinking to buy a desktop CNC milling system but I am debating because CNC is not my major. Another option for me is to find a shop to do this. Anyone can help me to find a shop which has micro milling capability and also is willing to do small volume samples? I have different patterns to mill but for each pattern I just need very few samples. I am located in Chicago area. I am will to accept any reasonable price.

Thanks a lot.