There is now an electronic version of the tetla. It runs on the counterparty system using the bitcoin blockchain. The name is "TETLAS". Other assets on counterparty may have similar names, but if they are not exactly the same, they could be created by someone else entirely.
For more information about counterparty, see www.counterparty.io and www.counterwallet.io.
For more information about electronic tetlas, we will post more information about it here later.