I have two extra SKF ZR1 hubs for sale. These were ordered and received just this week from LG motorsports w the ARP studs upgrade. Brand new, in the box and never opened. P/N is BAR 5049C and they come w the speed sensors for you C5/6 guys. Here's the link:
http://lgmotorsports.com/SKF-Racing-Hubs
I'd like $350 each plus actual shipping. Thanks!
(sorry for the crappy cell phone pics!)