Still got mine, freshly recapped. Long live right to repair, teaching kids about retro glory and how stuff actually works at the hardware layer will make sure such iconic pieces of computing will never reach the landfill.
…now if only there could be actual selling 8520 CIA replacement chips/fpga replacement being manufactured AND sold instead of destroying old motherboards…
8520's can still be gotten NOS from Analogic and probably a few other places but there are also a couple of projects in progress at the moment to replace the CIA's
https://github.com/niklasekstrom/cia-verilog
https://github.com/bwack/VHDL6526 (6526 and 8520 differ only in their TOD clocks so it should be simple for this to support both kinds)