At the moment I'd advise against it somewhat -- the silicon shortages have basically made the MCU and a couple of other parts unobtainable.

That said, I got mine from everyone's favourite PCB manufacturer: JLCPCB.

All the parts can be found on the BOM: https://github.com/tzarc/djinn/blob/main/Rev2a/Djinn-BOM.md

I see the parts list but are there build instructions anywhere?

Not really; it's a case of soldering on the parts as per the iBOM: https://github.com/tzarc/djinn/blob/main/Rev2a/bom/ibom.html

Only a couple of parts are actually dependent on the side you're soldering (and are listed on the parts BOM), virtually everything else is aligned in such a way that it can be soldered onto either side.