XENIX 2.2.1 key

[root]

I have a client I'm trying to do some work for and we need
to install some stuff.  Somewhere over the years, he's lost
his activation key and obviously we're not getting very far.
Original install was in spring of 87.  I know the key is in
/usr/sys/lib/mdep/libmdep.a, but can't figure it out.  Any
help available out there?

E-mail replys please, I don't read this NG that often.
Thanks....
Scotty
{ames,rutgers,texsun,smu}!attctc!ozdaltx!sysop