I have bought Land Rover tv screen headrests off of ebay, all i need now is the dvd player unit. Does anyone have any advice on which unit to buy and where i can get one? Aswell as this, im looking to get a tow bar fitted for towing a horsebox. I know there a different varieties of towbars eg swan neck and quick release. Does anyone have any experience or advice with these that would help me decide which to buy?