WTB E30 E28 3.91 LSD diff

[Bruno]

The diff on the race car is not as fresh as I would like it.

Any E30 or E28 3.91 LSD would be nice, no 318i as the diff is too small.

[Boomerang]

i have a 3.91 viscous coupling LSD, and a 4.10 LSD. Both medium cases for the E28 and E30 :)
Im in the USA however.