Vauxhall/Opel Omega (B) LSD

[fatjon]

As part of an ongoing project I picked up an LSD for an Omega but I would like to rebuild it before I use it. Does anyone out there know who makes it? I suspect it's the same one as in the Holden Commodore, maybe a BTR or borg warner Type 28 but even after some hours of googling I'm unsure. Anyone out there with a definitive answer?

Jon The Fat