I know that Lockheed Martin is working on a maritime patrol aircraft kit intended to "roll on" new C-130Js, as well as legacy variants of the military transport. Their spokesman has said in June 2019 that “the focus would very much be non-developmental. It's very much on the integration side." The company is hoping that the MPA kit could be added to the C-130 airframe with very little structural modifications. See: PARIS: Lockheed unveils maritime patrol kit for C-130 HerculesThis is the bit I would like to see confirmed:
"This purchase also includes sensors and performance improvements that will assist New Zealand during extensive maritime surveillance and reconnaissance as well as improve its search and rescue capability."
It is even looking at technology to remove the need to attach a MAD boom to the tail. "There are some sensors I understand that you can install inside the aircraft that you won't have to put on the outside," said Frese. He declined to name the technology or the manufacturer.