All I would add to what
@stmitch said is that given all the custom work you'll have to do to plumb in any kind of boost, you might want to think about just doing it the old fashioned way. Most "electric turbos" are just snake oil as
@lil_Blue_Ford mentioned - the physics and power required to make boost are pretty serious. The rare legit electric turbo is going to be cutting edge technology and very expensive, and I would argue unproven.
I seem to recall seeing a bolt on supercharger for the 3.0. However, as long as you're doing custom plumbing, I doubt you could make cheaper boost than a (conventional) turbo setup. There's a turbo for just about any budget.