were you able to get this done? it pretty easy after a few times lol... just go here: https://paper.dash.org/ click on wallet details then check bip38 encrypt and enter your private key and passphrase, then it will show you the 51 character private key in WIF format. Take that 51 character key...
There is a misconception with paper wallets that they have to be "printed" but the fact is they can be saved to a file in which case they never get to printer memory. Furthermore only the private key needs to be saved. The address and funds in the wallet can be restored with just the key alone...