For those who can't afford the real thing ( or a Messerschmitt, TG500 (Tiger), Goggo Dart, Isetta, Scootacar, Kleinschnittger F125, Peel Trident, Bamby and Mopetta) or want something a little less fragile you can get a kit car version!
http://www.modernmicrocars.co.uk/
Probably have a heckuva time trying to register it here.