We use Tustech stencils. Its $15 for sheet, each sheet has 5 stencils, and you can get a lot of uses out of each stencil. I usually trash a stencil after 25 knives, but you could probably get a lot more than that out of one if you wanted to make it stretch. Even at 25 per stencil, that's 125 knives per sheet. That's about 12 cents per knife.