Make a rubbing on paper before you cut it out to use as a template later?
- I just tried it with Tamiya tape, pushed against the surface. The hinge and latch get in the way, but it's pretty easy to trace the outline of the hatch, since it has a pretty deep gap around it. You can then tape it to plastic and cut it out.
I just tried it; easy and took only minutes.
Copy on tape:
Taped to plastic and trimmed:
I cut along the outer line, transferred the tape to another section and cut along the inner line: