This can also be done to SuperBeetles, but you will have to install the fiberglass fenders with the old headlights (available from many dealers.
The only part needed is a headlamp lens from a '87-'89 Porsche 911. The 911 lens will fit into the Beetle headlamp assembly as a direct replacement for the Beetle lens; no modifications needed. That's it. Click here for a company that sells the lens or the assembly.