Custom Portable Miniatures Case

I'm looking for a small, portable tabletop gaming case specifically designed for for a game I created. I already have the basic design in stl files but am having trouble with designing hinges and a latch. Instead I tried a tab system but it doesn't hold up well and would prefer hinges. I would like to retain the current overall dimensions.

Key Requirements:
- Small and portable
- Made from durable plastic
- opens and closes with hinges that don't require any extra tooling. drilling, etc...
- magnet or plastic latch to keep the case closed.

Ideal Skills and Experience:
- Experience in designing and creating working hinges
- Proficiency in working with plastic materials
- Ability to create compact, portable designs

Please provide samples of previous work.