Need help identifying part/gasket

[Shift_Lock]

So here is the run down.
Vehicle: 1993 Chevy S10
Engine: 2.8 V6

I developed a coolant leak in the back of the motor (bad freeze/expansion plug). During the removal of the plugs I noticed a small oil drip from what I believe is the rear cam seal? not sure.. I removed the plate and the gasket came off sort of.. half is on the cover and half stayed on the motor. I need help identifying exactly what it is and if anyone knows the part number so I can order one.. I asked around searched parts catalogs but came up empty.. any ideas? Picture is below (click to enlarge).

[3400-95-Modified]

Camshaft housing gasket, Right on Rock auto.

VICTOR REINZ Part # H36978	$2.37
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