For those with an interest in scale models, European manufacture NPE has produced various models of the DeLorean time machine in HO:
http://www.npe-modellbau.de/index.php?option=com_content&view=article&id=67:delorean-dmc-12&catid=45:automodelle&Itemid=71
The models include both non-powered rubber tired versions and a powered rail version. (Scroll down to the bottom of the page linked above.) I have the model of the basic rubber tired version, purchased from a European hobby shop.
See the illustration in this Blog post:
http://blog.reynaulds.com/index.php/model-railroading-is-supposed-to-be-fun/
(Click on the image to view a larger version.)
-- Ernest