seal identification?

[xt_gt]

just finished up my motor build on my 80 exciter 440 & going to put a comet clutch on.

just curious what the seal is behind the clutch, that slips in a little groove on the little aluminum plate you can remove to access the oil pump gears.
it almost seems like it seals on the clutch once the clutch is installed. figure i'd replace it if i already had it apart.

can't really describe it good, i'll see if i can get a pic to help explain what i'm asking.

 

[YAMMIEGOD3:16]

CRANK SEAL. 3:16 (yammie tony)

 

[xt_gt]

here is the seal i'm talking about. i see there is another one behind it, almost like a rear main seal.

are these still available & who has them?

appriciate it.