Cult of the p7 site is still up and running.
There are roughly KC date code Nickel M10s, 750 KC date code blued M10s, 250 KD date code blued M10s, 124 of the KD date code M10s are Cat 7454 marked.
That is according to the data from Park Cities Tactical linked below. Which is the best I've seen.
Production of Blued vs Nickel P7M10's - Park Cities Tactical
M10' blue vs nickel - Park Cities Tactical
The page you link to from 2004, was updated a few times in subsequent bulletin board posts.
As I think I may have mentioned, there are spreadsheets that were also produced with more information 1 and 2 years after that post. Good luck to all who can now scour that site, and possibly revive the registry for lack of a better word that was going on.