How to get the Arduino design a Plastic or Metal shell?

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#1

Is there anyone knows how to get a complete prototype especially a plastic or metal shell for the electronics design?
Such as a small automotive, wireless router or something else.

#2

You can try 3D printing services or acrylic laser cutting services for a prototype shell.There are few standard sized plastic or aluminium cases available.Search for “case” in seeed bazzar.

Thanks