I’ve managed to find these PCB renders:
And this wiring schematic:
Forum user @Jean-Charles_Lebeau was able to locate what we believe to be the correct button caps(KTSC-22) here, you might be able to find them on a website more appropriate for where you live if you’re not in the UK.
I haven’t located anything for the case, however, I’ve asked @albertgajsak if he has any additional files in a PM so if he’s able to send those to me then I’ll pass them on to you asap.
Alternatively, if you have access to a 3D printer, you can print one of two alternative cases by Albert or by forum user @n602 which can be found here.