This has probably been covered in a million threads; search is your friend
In regards to the gasket, you can get it from the dealer or check Autozone or Advance Auto; for the bolts, you can do the same or just take them out and go to Aubuchon Hardware (or a local hardware store) and find ones that will work.
Originally Posted by RaineMan
I'm not going to count on the installing shop being able to reuse anything from the stock setup.
And I have no idea why you'd have a shop install this when it's only 2 bolts and takes less than 30 minutes (including the time to jack the car up).