Thanks guys.

I only lost the bottom part of it. It tore off from the part that goes near the tire. And actually, I didn't lose it, I turned my car around and found it haha.

So, I decided I will just figure out a way to mount it as-is, because this way I'll be able to remove the now-separate bottom part easily if I want to install a new I/C pump or something.

Thanks for coming to my rescue!