>Seems like there should be some biscuit or cookie cutters out there that will work.

They come in sets, so it's an expensive way to go. I'd need a couple of dozen. Biscuit cutters are also probably too deep, being 3/4+. I don't know yet how important the height is; there needs to be some airflow over the baking item so it will dry and brown.

>A pipe cutter can do it but they're expensive.

Yeah, the cheap ones can't handle the diameter and the ones that can seem to get pretty pricey.