Is it feasible to add an aftermarket hydrofoil to a light aircraft? Could long, aftermarket hydrofoils be added to the water-skids of a plane (like this Cessna with pontoons or smaller)

Cessna 208 Caravan
not designed to have a hydro foil, to increase its ability to land on choppier water?
In theory, the pilot would first enter the water with the skids, clear of the chop, then stall the hydro foil similar to stall landing a plane thus giving the plane a soft or possibly vertical landing.

Grumman JRF-5 with hydrofoils
It's been done.  David Thurston designed a system for the Lake LA-4 that was purported to allow it to land on 5ft waves.  It may have been a bit of a handful (the Bucaneer is a demanding airplane on its normal hull) and was crashed by someone who took it for a spin without Thurston's authorization, and that was the end of that.