U need to find the entire floor from a 4WD Mitsubishi Mirage Cyborg. This is almost impossible to find, unless u're willing to source the halfcut floor from Japan.
The other way is to custom made ur existing floor to a 4WD, meaning alot of cutting to ur floor & back to accomodate the long shaft, rear axle & drive shaft. Not as reliable as the method mentioned above. Plus JPJ can confiscate ur can if they find out.