adapter

Hi everyone can anybody give me the sizes for the pin adapter that locks the damper in place centre of bike on the lower tree the thing with a radius from top to bottom of it must be for clearance me thinks as I want to make one for my none existing one as I,m gonna get a damper for it cheers...

I have just put this on ebay, did try to put it on here for sale but kept getting a message about too many tags, no idea what that was. Anyway its off my single subframe to adapt for twin cans and you dont have to drill your subframe. Am after a grabrail if anyone can do a deal. Item Number...