Design a Plastic Latching Door Piece

I need a small plastic door piece for an electronic device modeled. It has a pressure latch, and a very important notch on the back, that tells the device it is on.

I believe this would be fairly easy for someone with experience. I plan to 3d print it myself, I'm just struggling with design. I have calipers and can provide dimensions.

Requirements:
- Design a functional plastic piece.
- Support a spring-loaded latch mechanism.
- Ensure durability and reliability.

Ideal Skills & Experience:
- Experience with latching mechanisms.
- Knowledge of plastic materials and their properties.
- CAD software expertise.

Please provide samples of similar work done.