unfortunately, at this point in the game more than ever, anybody who can afford to buy a turbo for a 05-10 v6 is just going to trade the 4.0 for anyting 3v or better.
The handful of die hards left can fab up their own kit. Its not super hard like making an intake manifold for a PD blower, you can find people to weld pipes without wandering to far from home.