You still did not say where you are. Just generally will do, like I think my profile says "Southern California" and not my actual city and neighborhood. It helps because so many of us are in the US and we may direct you to places that, if you are in the U.K. or Singapore or something would just not apply.
What you are missing is called a cowl, the part number for the complete assembly is: Part# 74218-TM8-A00
Let's see if I can copy & paste the image.
The other thing about location, sometimes one cannot open pages from other countries.
What is your Insights mileage? (or km) ? Does anyone here think that the cowl gets removed to replace the spark plugs? Might make it easier th get to them? It might be sitting at the mechanics who last serviced the car.