I was previously of the opinion that UT were the only manufacturers of the Z3, but it was mentioned on another thread that Minichamps had made one. in my humble opinion opinion i thought that this was unlikely, and i suppose you shouldn't believe everything people say on the net.
I'm still confused though, and if anyone has made a 1:18 Z3 other than UT, they have kept it pretty secret.
The only other one I know of was the Burago Z3 M but this was way off scale .
I have the 1st issue Z3 from UT with the steel wheels ( a 1.9 version I believe) and one of the last facelifted 2.8 Z3`s along with 6 other versions including the 007 Z3 and a dealer 3.0 coupe , and all of them were done by UT.