Update...
The nice people at Pilot Aware contacted me to advise that 'PilotAware' is a registered trademark, so they would not allow me to write 'PilotAware' on my case, but I could sell it as a 'Case for PilotAware'.
So, I've removed the black text from the case lid.
Also, as a few people here and PilotAware themselves have concerns over the lithium battery used in the Pi power module, I have designed a battery-less version of the case, pictures below, complete with 30mm cooling fan.
The fact that this is the same battery technology used in most power banks that are the usual method of powering kit like this when the aircraft doesn't have a socket, and those are considered safer seems a mystery to me, but OK..
Conveniently, there are 5v and GND pins on the PilotAware module nearby which are ideal for powering the fan. I'm waiting for some short USB plugs to arrive to see if they will clear the fan as a plug-and-play fan power option. Space above the SDR dongle is tight.
If anyone is interested, I should be able to offer this as a kit complete with fan, antenna/cable and fixing hardware soon, or just case + hardware sooner if you have your own antenna etc.
I modified the original battery version to move the power switch and add a fan, for anyone who might be interested in that version, and the associated risks.
I need to confirm the costs of the SDR antenna/cable, fan, hardware etc, but i'd expect the complete case kit to be in the region of £20-£30 if anyone's interested.