One VW beetle
One spaceframe augment chassis
Electrics and switches to taste
Take some spanners and remove the Beetle body from the chassis. This may require the addition of a sprinkling of swearing, hammers, and grinding to add spice.
Once the body has been thoroughly beaten, remove and dispose of carefully. Your local pikey should be able to help you with this.
You will be left with a rolling chassis with all the mechanical components in place. As we are not French, will not be simply applying a cheap plastic garnish but we will be using a healthy dollop of good old British steel.
Simply add the steel to the chassis and bolt down.
Bolt the steering wheel on
Put the seats in
Connect fuel line and a wire to the battery and ignition
Now get in and drive.
It is very easy at this stage to burn rubber, but this rarely affects taste, in fact it can enhance the final presentation considerably.