I get the idea of making a frankenstein computer, I just disagree that 6502 is THE platform to do it on. Practically, there's no way for me to find it. Other comment mentions ARM, which is a much more interesting proposal to me

ARM is an interesting proposal if you want to order a SBC online and run software on it. Soldering an ARM CPU with low tech tools? That's something else.

Time of a strategic reserve of J-Links?