RetroComputerInstructionManual

Retro computer kits

Altair 8800

AdWaterAndStir, Altair-Duino

Altair kit

Link: https://www.adwaterandstir.com/altair/

IMSAI 8080

The High Nibble, IMSAI 8080 replica

IMSAI kit

Link: https://thehighnibble.com/imsai8080/

Other systems

If you prefer a more modern take on a Z80 based computer, look out for the RC2014 series of kits. If you would prefer to go old-school, then check out the Altair 8800c and the S-100 Computers site.

Although a completely different kettle of fish, no mention of retro-computing kits would be complete without listing the PiDP-8 and PiDP-11 from Oscar Vermeulen.