Ben Jackson wrote:
I called a locksmith who said that disc tumbler locks were not made
to be disassembled an re-keyed. My goal is still to match the door/
baggage locks to the mag switch (they're all the same family of key).
Is there somewhere I can order replacements for the door/baggage by
the key number of the mags?

They can't be rekeyed, but you can just buy new cores for allt he
locks. Aircraft locks are cheesy cabinet locks in general.