Taler could be a good match: it's a digital coin that has been in development for a long time and is currently starting to see real use. It guarantees the anonymity of the buyer but not the merchant (to avoid tax evasion and money laundering). It's not a cryptocurrency (no blockchain, no intrinsic value with floating rate), it's really a digital form of whatever currency your exchange uses.

Now the only working exchange I know is in Switzerland (https://taler-ops.ch/en/). I wonder if you could legally use that from another country... I think GLS Bank is also supposed to have an exchange running in Germany some time this year but there have been delays in the past. Anyway it's probably still a bit early but it could be something to consider.