Direct swap other than the old fixing screw holes don't line up but are covered by the new housing, so fresh screw holes is better than reusing old and nothing shows when finished.
I really don't think you'll need instructions to fit, clean off old sealent using a plastic scraper for any thick stuff so as not to scratch the paintwork and a rough rag soaked in white spirit for the rest. Probably take well less than an hour to do