For those of us with access to a 3D printer, the following links might be of interest. I've just added the first two to the Links section (Elena's was already there).
A couple months ago, user Zarlor (a friend of mine) added a standard piecepack design to Thingaverse...
https://www.thingiverse.com/thing:2860020
Also on Thingaverse is a stand-alone custom set for Alien City (one of the most highly regarded piecepack games)...
https://www.thingiverse.com/thing:789887
And in case you missed it, here's Elena's 3D printable piecepack files...
https://www.trueelena.org/fantastic/feelies/3d_printed_piecepack.html
Any other known 3D printable versions?
--James