Is that something you make lots of ?
I have made two machines so far for gold and silver, but i build them way to strong for what they have to do. Those cheap chinese ones might work but you will be regretting that choice soon.
If you have to make more of the same type/design, it would be much better to make a small hand press with tools for diferent types. Most probably using hardened steel would not be required bringing the price down by quite a bit.