Well, if you don't have a /System/Library/Perl directory then you've got big problems. I just checked my installation and I've got one... you may need to do a recompile of Perl from source, as it is extremely unlikely that you'll be able to find a binary anywhere. The good news is that the BSD layer may take Perl without a hitch... the bad news is that you may learn a alot about compiling in the process. :-P