Found these all on ebay just now. I have the same dog guard but there are no mounting points at the bottom on my seats but is still held well by the headrests
http://cgi.ebay.co.uk/Mitsubishi-Gal...QQcmdZViewItem
http://cgi.ebay.co.uk/Mitsubishi-Gal...QQcmdZViewItem
OE roof bars as well
http://cgi.ebay.co.uk/Mitsubishi-Gal...QQcmdZViewItem