3D printing is still slow, undetailed (grain, stepping...) and expensive for pieces like this. I prefer another fabrication methods, 3d printing is perfect to get a first prototype, but if you need a few hundred pieces you should find other ways.
That is not an easy part to mold. the mold has to come apart in a special way, like a four part mold or something
Are you able to produce in quantities ?
I am very interested in acquiring some of your custom 4 ways with the stone print, like you said Geobra's is smooth but that was probably done so that it would make sense in brown also.