Fitted mine with Osram Nightbreakers years ago. £15 on Amazon

Great bulb, nice white light and a huge improvement over the standard H7 bulbs. Would definitely recommend them.
Very easy to fit. It looks tight but I managed to get my chunky hands in there and get the job done in a matter of minutes.
Just remove the rear rubber cap, reach in, grab the fitting and twist/pull, take bulb out and replace with new one (don't touch the bulbs glass casing).