Might get a bit difficult, because people who have "lame-duck" K2002 want good K2002 and people with good K2002 don't give them away easily
Anyway, before butchering a repairable K2002, I would try to find someone with fancy Xray gear, like this one:
A little less acceleration voltage, a bit more contrast and I bet you see the traces quite well, it's only 4 layer, IIRC.
And if you butcher a K2002, consider this video and find someone with good surface grinder (maybe me in the future
):
Then you can extract full PCB design and make replacement boards in case of epic meltdown