Yeah, but these are not exactly complex parts, especially compared to RAM/etc. RAM fabrication is orders of magnitude more difficult than the parts we’re looking at here.

I’m not saying it’s something someone could get going tomorrow, but beyond the PCB for the PSU everything else is fairly standard and mostly interchangeable. People have made PSUs in their basements. And, for CPU coolers, it’s effectively a piece of metal with a fan attached. If we’ve lost the capability to machine more aluminum and copper I feel like our problems have evolved beyond computer hardware.