please help me identify this LSD

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Hello guys.

the story: i bought a complete rear subframe from a japanese importer. it came with this diff, which i thought was VLSD (so i filled it up with lucas gear oil). when i installed it, the son of a ***** would clunk and clack, and the rear of the car would jump and skip. total pain in the *** in social situations. in addition to being dangerous in turns, it would buck and no go smooth at all. very scary to drive in the rain even.

so i was reading around and read that clutch type LSDs chatter and make noise. but i thougth..nah its a VLSD, theres gotta be something wrong with the ring gear or something. so today i dissembled it, and found out it is in fact a clutch type LSD. now i need to identify which brand so i can order new clutch plates and fluid.

The pictures:

im thinking its nismo lsd, but i need to be sure.