I am in the process of making a 4-1 turbo manifold custom made for aveo/lanos/nubira 1.4-1.6. If anyone is interested. You can look for me.
Its currently made with a small T3 turbo flange and 38mm standard wastegate flange. It also came with a cover and screws/nuts if you wish to seal the wastegate flange. It also came with the EGR removal function, meaning the flange will block off the EGR gases from going to the EGR valve.
Now its in the final stage of testing whether the manifold with a standard T3 .42/.48 turbo will hit the engine block/radiator fan. I am not too concern with it hitting oil filter since most people will install a oil filter relocation kit with the installation of a oil cooler.