Seems they’re 11.5g plastics with metal slugs that used to be sold by gamelandsports online for $0.26/chip ($0.15/chip for the non hot-stamped version)
You can buy these 11.5 gram plastic blanks at Spinettis or on eBay. Just search Ace Jack chips. They are basically dice chip variations.
If you are looking for value sorry. At least they are bright colors and have denominations stamped on them.