how thick it the plastic on the snorkel? what about using a heat gun to heat up the plastic to shape it to the window a little. i would think it would give enough stretch without breaking or tearing the plastic then just krylon it black.
i do alot of fiberglass systems and interiors so maybe i can try to glass one to fit the explorer if more people where interested and if i get the time before my deployment. you could easily make it more of a molded shape to give it a clean streamline around the fender up to the roof