The Son of Dathomir arc, the final completed Star Wars series from Dark Horse, comes directly from unfinished Clone Wars episodes, 4 issues/episodes in full, and is in fact the only canon series from Dark Horse. It literally picks up with Sidious having Maul in captivity, plotting out those 'other uses' he mentioned in The Lawless, and ends with Talzin's death and Maul's escape with the Death Watch commandos.
Additionally, Maul's legs were repaired (along with Savage's arm) by the Deathwatch, quote 'after the Jedi gutted them.'