This is on ebay at the moment:
http://cgi.ebay.co.uk/t4-rocknroll-bed-to-suit-transporter-and-others_W0QQitemZ230327016789QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item230327016789&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A7%7C39%3A1%7C240%3A1318
Has anyone got one of these...