Discs 1.5" x 0.1" and 1.03" x .03"
How tight are the tolerances?
What is the material?
Do they have to be perfectly flat or can a small burr be tolerated on the rim?
Styrene, polyethylene, polypropylene, polycarbonate, ABS, PVC are all available in sheet and film; You should be able to get discs like this punched out in large quantity for very little more than the material cost. For your prototyping you could do your thousand or so just using a simple setup on a manual arbor press.
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