According to some references, Russia sems to relaunch the Beriev Be-40 program. So, since the proptotype has Soloviev D-30 engines, like the Il-76, is possible (I think) to replace them with Aviadvigatel PS-90 and some modifications to the airframe. Another variant is the propfan powered B-42PE. Who knows what we will see in the future from Russia in seaplanes.
So, I changed the D-30 with the PS-90 and there is the Beriev Be-40M:
P.S I like wery much the Convair CV family above and the Kawasaki T-4. Well done Cascadia!