How can I get a pair of black crocs made in Vietnam?

I ordered two pairs of crocs. One white and one black. The white one is made in Vietnam and the material seems nicer the shape looked 10x better, and the fit was way better. The black pair was made in either Mexico or China (i dont remember because i returned them immediately) and the fit and shape were awful.

How can I get a pair of black crocs from Vietnam??

Also, WHY IS THIS A THING OMG. Aren't they just molds? How are the molds different? It can't be this hard to make the most simple shoe on earth.