I think I've said this before, but the RAF Rescue Launch and new Walrus offer the possibility of a "The Sea Shall Not Have Them" boxing with just printing and moulding costs to write down.
You thinking of a forced perspective diorama. 1/72 scale launch with a 48th Walrus, could look interesting.
Remember we do this for fun John the Pom.
That hadn't occured to me, but the whaleback builds waterline, and there is a scene out at sea where the Walrus flies past the whaleback...