I have my original one, no idea after all these splits, PoS, etc that it is even valid at this point.
If you have your original wallet.dat then you can still convert them to POS. No matter if the wallet is encrypted or not. Just do not transfer the coins anywhere. Even if you transfer them somewhere you can still switch them to POS. Actually you can do pretty much everything, but the only thing matter is that you don't lost the original wallet.dat
So if you have coins in your original wallet, I can help you switching them to POS.