I purchased several different enclosure since I'm not sure of final packaging. The largest arrived (it is actually a somewhat chunky handheld enclosure rather than wall mount), two haven't shown up yet but from a 1:1 printout of the drawings I think the largest is going to work best anyway. 

Started mocking up layout of components in the enclosure. I'm going to perforate the battery door and use that space to house the temp and humidity sensors - away from heat generated by the electronics.