I think if we are trying to replace the Fokker , with alternative down the line the Bombardier's Marine platform is a wonderful option
C4ISR Bombardier (Canadian Company)
Has an ideal modern platform for marine
In today’s world, gaining vital information for military, government and civil organizations is critical. The unique combination of our aircraft’s performance features and spacious interiors, enable us to provide superior special mission platforms that make gathering intelligence around the world possible. From aerial surveillance over land and sea to battlefield communications management, or command and control of friendly forces in theater, we have the specialized solution to meet your challenge.
Mean while Sword Fish , platform from Sweden is a great alternative for P3 Orion