So I searched for something suitable on eBay and found this:
It's actually intended for a Gopro Hero camera but with a few snips of the foam it fits the 2B so perfectly it could have been made-to-measure. There is also room in the lid for your cables. Quality is very good and as for protection I'm pretty sure I could hurl this against the far wall without damaging my unit.
Ordered from China the lowest price is currently £4.66 ($9.66 in the US) including worldwide shipping. Be warned anything from China takes up to 3 weeks to arrive. If you want one just go to this eBay search:
eBay UK: https://www.ebay.co.uk/sch/i.html?_sop= ... 2.50&_udhi
eBay USA: https://www.ebay.com/sch/i.html?_from=R ... =3.2&_udhi
Or try a different search to see if you can find it any cheaper.
The one you want has the approximate dimensions of - 16 x 11 x 6.5cm / 6.30 x 4.33 x 2.56 inch
If you need something bigger they also come in two other sizes:
- medium - 22.5cm (L) x 17.5cm (W) x 6.7cm (H)
- large - 33cm (L) x 22cm (W) x 7cm (H)