Manufacturing a chip is expensive, it requires volume. But you can put this in altera's new flash fpga's(max10) and have a working mcu(if this fits you might

Manufacturing a chip is expensive, it requires volume. But you can put this in altera's new flash fpga's(max10) and have a working mcu(if this fits you might even get this is in a $3-4 chip) ,but the core is only a part of the design, you need to add peripherals and memories.