missing Pg.pm in Postgres v7.3.1

Hi everyone,

I was wondering is version 7.3.1 missing Pg.pm.  Trying to install 7.3.1 it 
and using Pg.pm in a perl module during my install and database import it 
keeps failing.  It is asking for Pg.pm and in v7.2.3 Pg.pm is found in the 
src/interfaces directory in the tar ball, but I can't seem to find it in 
v7.3.1.  Am I looking in the right place?  Should I be doing something else? 

Thanks

Linh