[Shotimes] Metal gasket?

[Steve Tatro]

Hey, stupid question.
 
What's the big metal gasket on the "rear" of the oil pan called?  Not
toward the rear of the car, but to the rear of the engine.
 
C'mon, you know what I mean ;^).
 
I have some oil seeping out from around this thing, and figure it may
actually have been torqued down too tight at some point.  Make sense to
anyone?
 
I'm thinking of replacing it when I do my rod bearing (since the pan
will be off anyway).  Suggestions for where to buy a new one?
 
Thanks,
 
Steve Tatro 
Red/Black '93 with 167k miles 
Cincinnati, Ohio