Looking for S/H LSD for e46 330cd msport

[gizard]

I thought that an M3 one would fit but I'm told this is not possible. Anyone know where I might get an LSD for a reasonable amount?

[gizard]

Thanks for the reply. I know that the E46 didn't have an LSD as standard - I was looking for a second hand one as I don't really want to spend 800-1000 on a car that I'm not going to have for more than and 1 & 1/2 years....