Need Shop for LSD Install In Northern California

I am seriously considering installing a Wavetrac or Quaife LSD in my 2007 335i with bolted diff.



Can anyone recommend a shop with experience installing LSDs into bolted 335i diffs and an approximation on cost for install.



I already have a coilover set-up, m3 bits, and m3 bushings so this should be icing on the cake.