These are fun. I remember buying one way back at 12 or so. I always snag them when they find me. All 50 states have been done, and a multitude of other things.
Ever think about doing them yourself?? Zinc cents probably could be done with a hardwood carving, but this below would be fun. https://www.amazon.com/Supply-Guy-C...coding=UTF8&psc=1&refRID=2Q02W8QY3B03GSFSEMDY
Pretty neat looking, Fun to look for, Maybe have your own special stamp made and circulate them see where they turn up.
The is a company that will make up a special punch ( up to 8 mm, about 1/3 of inch) with your design for under $100. But there are some interesting ones. For bullion people. Stamp the zinc plated cents from chem class .925 https://www.amazon.com/ImpressArt-1...00IIQ5F0I/ref=cm_cr_arp_d_product_top?ie=UTF8 Maybe I can find one that says 'China' on it, imagine the stir it would cause
There is a company where you can have these made, I think you have to pick from their designs and purchase so many. I'm quite sure they are still in business. I was a bit surprised to see Shrews on a 1995, that is the most recent coin i have seen with a counter stamp like that.