It appears your search engine is a bit on the light side. Try looking with this: RC receiver I BUS arduino " as the search term, I got a lot of hits and some pictures that looked to me to be what you want. With your very clear explanation It was easy to find them. Of course I would not know if these have the correct parts, they have your terms.
Does that go for meals as well, somebody hungry then you?
Practice will give you experience which will give you knowledge.