Well i was talking to a bloke at work the other day and he was telling me how he used to build cars called "bullets"
He showed me some pics and it turns out they produce a 1UZ powered mx5 with complete new chassis setup and offer a supercharged version. This company is based on the Goldcoast. These cars are street registerable.
I also believe these guys sell engine components seperately for anybody toying with the supercharger idea for a 1uz.. also the carbon fibre engine bits would dressup a soarer engine bay nicely. They also sell complete built long motors, valves, modded heads and can get cams built to any spec.