I ordered my new clutch from SOS two weeks ago, and part of the price providing a "core exchange." All SOS required was the pressure plate, mid-plate, and flywheel (along with bolts). This is a sure sign that as mentioned in previous posts here, the clutch disks should not be "refurbished." Hope this helps to reassure you that you should keep researching and asking questions before you decide to go through with this clutch.
HTH. Good luck.
Chuck