This isn't a replica and it isn't something I built, but I had a set of Touhou dice made for tabletop gaming. They're all six-sided and there are two kinds: Red and white with a yin-yang symbol in place of the six, and black and white with the Hakkero trigrams in place of the six.

I didn't make these myself, I had them made professionally by Chessex, but they're still a unique Touhou item. Well, sort of, I had to have ten of each made to fulfill the minimum order size, but I've only allowed a few of them each into the wild, so they're mostly unique to me. Anybody else could have Chessex make them the same thing, but as far as I know nobody else has. At some point I intend to get a second set made, with a green one with Sanae's frog hairpin and a blue-green one with the ghost symbol from the hem of Youmu's dress.
I make Power/Point/Faith/etc items out of wax beads; I guess that counts lol.
Actually those would make badass dice too. Don't know why I didn't think of that before.