How can I make 4x3 mm metal tags?

I need to make or buy a ton of oval or bar-shaped blank metal tags that have the dimensions 4x3mm no hole drilled. I can't seem to find those dimensions for a metal punch or ready made. I would prefer to purchase the tools or the tags in USA or Canada if possible to cut down on shipping time and cost. I hope someone here has a recommendation. It would be so appreciated!