I had Vincent at Mr. Paddleshift install the paddles on the M-Sport wheel that I bought from Macon BMW about a year ago, along w/the internal electronics. He also supplied a new switch that mounts inside the steering column, a wiring harness, and very good instructions for installation (although the pics could have been a bit better). Vincent gave me a very good deal and I'm very happy with the result, but it's a fairly expensive mod to begin with. There are quite a few options available for paddle shifters and some on the board here have simply bought the wheel, switch, and made their own wiring harness (Suresh is a good example). You can get more info on your options from Vincent at MrPaddleShift.com...

__________________
'08 335i Coupe - Barbera Red / Saddle Leather / Light Poplar Wood / 6spd Manual
Options: Sport, Premium, Cold Weather, Comfort Access, Active Steering (awesome!), Power Rear Shade, IPod Adapter, Navigation w/IDrive
Mods: M6 Wheels, Split Armrest, M-Steering Wheel, Euro Light Switch w/Rear Fog Lights, Short Shift Knob w/Matching E-Brake Handle, Clear Reflectors, CDV, Clear Bra

Retired:'04 X5 4.4i