I have one spare set, and they should be readily available within a week or two wait, depending on when they went out, however, I must say, that unlike my corvette and camaro customers, Z people seem to hold on to my cores forever. The last guy was quick, but the one before that kept them for more than 4 months before sending them back, despite my constant reminders.
When I had a 350Z core set, 2 months was the average return time, until someone decided to stiff me and just keep them.
Not to tempt you, but....
