Yeah I got screwed with those damn Tusk ends twice, i don't want to see it happen to anybody else. The first time I got just a set of stock style replacement ends for $30 which seemed like a deal, lasted me about 3 or 4 months and the rubber boots just split and cracked apart like 30 years of dry rot.
The second time I got screwed by them I bought a male threaded rod (Honda style) kit from trailtracksand.com, spent like $120 shipped on it but at least it wasn't junk Tusk stuff (or so I thought). The box shows up on my doorstep a week later, open it up, and there's a Tusk sticker in the bag. I was so pissed! But I needed them that weekend so I put them on and hoped for the best. The best I got was about 5 months before 3 of the 4 joints were so sloppy I was worried they were going to pop apart if a strong gust of wind blew by.
I went with a 12mm kit like the ASR one and never had a problem after that.