Since I've a pile of these boards lying about, and really prefer a proper case to a plastic one, I have one particular one that stood out to me:   https://www.amazon.com/gp/product/B079CF5FNX/   The case is aluminum, with machined end blocks and a perforated top.  This would be my recommendation for any hot board like the Tinker Board, and to be honest the one I bought is quite nicely put together, with a somewhat industrial feel.   Does anyone else have a favorite?