Hi Andrew,
I do have a Lexus RX dog guard (GBNGA-4G146-05) for sale if you might be interested. I can provide photos and details should you wish to see or hear more! I have listed the item on eBay which you can see through this link:
http://m.ebay.co.uk/itm/Lexus-RX-Dog-Guard-/322484540428?hash=item4b1593940c%3Ag%3AySAAAOSwJ4hY8l8E&_trkparms=pageci%3A5e7a68e9-2209-11e7-8969-74dbd180f864%7Cparentrq%3A72dfebef15b0a60ce377c168fffc22fa%7Ciid%3A1
If you are interested please do not hesitate to contact me!
Nick