Dorance Armstrong showed potential at DE, plus Gregory. Tyrone Crawford and Taco Charlton could back them up.
David Irving can be resigned very cheap due to his headcase decisions, so you could keep him on the roster and help him with his psychological situation while getting him ready to come back and play both DT/DE in 2019.
Maliek Collins, Antwuan Woods, Caraun Reid and Daniel Ross could be kept to handle the DTs positions. Possibly try to draft another big hole plugger during the draft.
There. The Dline could be kept intact, still competitive and for cheap without having to pay such a ridiculous amount of money on just 1 player. If D-Law truly is asking for $100 mil with $70 mil guaranteed, let him walk. Use his compensatory pick to draft a position of need. D-Law is expendable.