Thanks bro, it's a standard hood pad I purchased online for my car. There were two easily available options (the third being a dealer part, which means it'll be expen). The first had a heat shield (like what you have but only at a certain part of the pad), and the other without it. I opted not to get the one with heat shield because that's for a different variant, and from my experience panget ang material nung pad with heat shield. The one I got is nearly an inch thick high quality foam pad.
I would just go with the remaining material to cover up the space between the X frames and the hood panel itself in your Avanza. Since hindi naman siya makikita, it's good to have it but not necessarily see it. Alternatively you can opt to cover the X frames, just fold it up into the same inserts you did for the flat portions.
Maybe this next idea would make your car quieter too: insulate the firewall
That may take more skill and time but if properly done you'll notice a good reduction in cabin noise levels. Don't forget the transmission hump as well as the prop shaft tunnel. For the firewall it's best to do it from the engine bay, unless you want to tear up the dashboard. For the transmission and driveshaft tunnel it should be easily done from inside the cabin.
I was just looking at the pics you attached above, I hope you copied down the information on the decal that was covered with the new pad. Those ones usually list maintenance information about your car.
