I've often looked for this, and there are surprisingly few options. Maybe something like this would work? https://www.amazon.com/Geekworm-Raspberry-Storage-Mat

I've often looked for this, and there are surprisingly few options. Maybe something like this would work? https://www.amazon.com/Geekworm-Raspberry-Storage-Matching-Enclosure/dp/B07GRZRW7J/ref=sr_1_3?keywords=raspberry+pi+case+hard+drive&qid=1582215950&sr=8-3 https://www.amazon.com/Geekworm-Raspberry-Storage-Matching-E...