No. I got a polished inlet manifold and throttle body, from Paul at whifbitz who sent out a jspec. I can't remember the differences but I did start adapting it and gave up as it was easier to just get mine polished.
Converting the jspec to UK spec, the throttle cable bracket has to be modified as the bolt holes don't line up. I think there are less vacuum line connections, there's a hole to be blocked off and one to be drilled and tapped I think. One of the manifolds had a large thredded hole. And then there's the egr valve on the back of the manifold. I think it was the support bar I went to fit and found that the bolt sizes were different.
The throttle body should fit, the difference being that the UK has some soft of damper fitted to the throttle pulley with a vacuum line attached to the underside of the throttle body. Although thinking about it, it could be a auto/manual difference not a UK/jspec difference.