Maybe we should add:
http://www.birdsauto.com/ They ship the Quaife LSD already mounted into an exchange final drive anywhere and that is a big plus
, since the BMW-original has a welded crown wheel which makes installing a tough job.
They have an exclusive on this solution. There are many posts on them in E90POST.
Furthermore I think
http://www.evo-s.co.uk/shop/index.php?cPath=6_2372 should be added. Evolve supplies an excellent ECU upgrade which they also ship abroad, which I installed today quite easily into my 335d (350Hp and 730 Nm).
Again many posts in E90POST.