They supply and install the "Blue Ox" and "Ready Brute" towing systems. My brother and his partner are in the process of organizing a system for flat towing their car behind their Motorhome.
Even thought they are in Qld you may be able to email them and seek advice.
Flat towed a duel cab 4x2 Hilux from WA to the NT. Was fitted with a battery isolator to ensure no air bag issues, other than that nothing else modified other than the tow kit fitted.