If you are after studding, the smaller you go, the more expensive it gets, if available at all. It is much cheaper to make yourself.
For small ones, I first get the thread started and thru the die, then I hold the first bit of thread produced in a pin chuck, or pin vice, held in the chuck of a battery drill, and wind it thru, drill running in reverse from the back of the die. You can easily make a 6" length in whatever material you require in less than a couple of minutes.
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