I have a complete disk to disk zenki LSD GTS rear end with pretty much brand new slotted rotors and Axxis metal master pads. The rear end is in excellent condition and the LSD locks great (as far as stock diffs are concerned). The gears make a little bit of noise at extremely light load cruising and may need some adjustment.
Located in Austin - $375. May be willing to deliver within short distances for a price.