There are just to wide a variation of vehicles to have the perfectly vertical surface req'd for 45 degree bend in that polished metal.A whole range of angled bends needed for so many different car body shapes would be impossible to get correct.If supplied it would be a Cust. service nightmare.
First time I've watched that vid & a Dual Rear install like that would likely test well,...against Radarrob ? - I'll let ya' know after I give him a go again.Making changes here...