It's NLA.
The 55 mm really doesn't fit the 60mm pipe; even after bending it open & trying to fold it around the 60 mm pipe (I've tried it)
I've decided to make it myself, it isn't the most difficult part to make. Cut a strip, fold it around your tailpipe. bend the 2 parallel sides, drill a hole. Have it zinc plated.
I need to make one for myself; if you want I can make you one & mail it, but it'll be 6-12 months when its ready.
Erik.