Sorry not from us… but… we might be able to work something out for key 2. It’s always been “reserved” with the idea being that we might eventually release it to customers.
Once Apex is out we may consider an open DT product based on the ntag424… but given our experience with the xDF2, maybe you and 2 other people might actually be interested in doing something with it… I mean, the DESFire chip (both ev1 and ev2) have some powerful features, including encrypted sessions, but nobody uses any of those features… people basically just create a maximum size NDEF file that eats up all 8k and then store a vCard with photo on it 
If you’re really all hot and bothered for an unprovisioned ntag413 I may still have a couple sitting around. Not likely, but I will check.