Just ordered the below seatblet guides from http://www.boom-enterprises.com. (email them quoting 'Kumoi Motors Seat Belt Guide for Copen') The cost including postage from Japan was £104 using paypal. Not cheap I know, but a couple of times I've had people get out of 'Rex' and close the door trapping the seatbelt metal tab in the door! OUCH! No damage so far, but it's bound to happening. SO I hope this will be an investment!