Hi all. I'm doing a project for a paper where I plan on comparing the imaging characteristics of pinholes. I need a source for economical pinholes of different sizes. I usually just make my own, but need more sophistication for this project. Where can I quickly get a set of pinholes (4-5) reasonably cheaply. I see a guy on ebay that's located in China, but that's going to take too long to get to me.