Bought an NOS rear tail lamp bracket from Stafford for the Gilera, origin unknown.
No markings on it, but, there were 2 bolts with the number 4 in the heads. Now I know Kawasaki number their bolts like that so it was a matter of using google images to find the correct one.
turns out it was a z400 twin bracket, it suits the Gilera and is very close to the original, so I'm keeping it