I have an Axle Exchange one-piece aluminum shaft for a 6060. It's in great shape, but it has a hole in the grease boot. A new boot is $30 through Axle Exchange. I just never got around to ordering one.
like I said. My buddy has a carbon fiber one with less than 1,000 miles on off an 08 gt500, he's going to 9",it's in perfect shape. Pm me if interested
I'll get back to you ,with the specs, coming home from vacation tonight, I think he would like $800 , he paid $1200 for it ,worked great no vibration, he just put a 9" in and can't get it shortened or he'd keep it