>>213968097
I recently developed a habit of walking into various small stores of nerdy stuff when I spot them (in malls and other such places) and asking them whether they have D12 dice, but not a regular dodecahedron, but a rhombic dodecahedron. Or, if you don't have that one, how about a triakis tetrahedron? None of them had them available so far, but the reactions are nice.
(mass-produced rhombic dodecahedron dice do exist, I own one. mass-produced triakis tetrahedron dice, I don't think so.)