My kit was bought in pieces, but cost me around $2200 with lines. They had seen 1 hill climb and 7 laps of Sandown before I got my hands on them.
Stuart from Benson Motorsport has them new and is a top guy, so speak to him if you're keen on them. Should save you a bit over the AP's, and get you a bigger disc. If you want another opinion speak to this guy, he has them on his 180 too: http://nissansilvia.com.au/forums/index.php?showuser=27028
I priced up a lot of different kits, and did a lot of research and these ticked all the boxes for me.