I just swapped out the spinlock on my A-cat's traveler for a normal cam cleat. The spinlock is in good condition. Rope range: 8-12mm or 5/16-7/16". Mounting screws are 1.5 inches apart.
I have no use for it, so I'm giving it away. I'll mail it to the first person in the continental US to respond to this message (and then PM me your mailing address).