Taking delivery of the X on Saturday but have a couple of Q's for y'all...

I am seriously considering the Aero Kit but can't get a straight answer from my dealer how much it will cost and what parts are included - so I come here, to the arm-chair experts and rabid X fans that we all are...

1. Dealer mentioned 12 pieces - does anyone know exactly what pieces are included?
2. My X is a 4.8i and has the 20" rims and running boards - are there parts in the kit that I won't need (I read somewhere that wheel arch flares are in the kit but are also already on the 4.8 w/ 20's)?
3. Can individual pieces of the kit (i.e., the front and back lower bumper pieces) be purchased separately?
4. Quote from dealer is approx $3200 including parts, labor and paint. Can anyone reccomend other sources (wholesalers or such) that I may be able to get the kit and installation cheaper (I am in the NYC area)?

Sorry for the laundry list -- can't wait to pick up the X!!! will post pics from the dealer this weekend....and after my carefully selected forthcoming mods!