I removed the headlight bucket from the core support to determine how much material would need to be removed. It wouldn't take much, but I wanted the cuts to be clean. I pulled out my air powered jigsaw and marked the bucket.
The boot is too soft to use as a template, so I searched for something that was the correct size. Fortunately I found an item to use as a guide in my tape drawer. This was much quicker than creating a template.