I can understand why someone would want to avoid the hassle of building their own generator. If you buy one and it doesnt work, then you will be discouraged and will have wasted your money. Would it not be better to build one first, find out if it will work on your vehicle. They are cheap and relatively easy to build. I understand its your time and money, but I would hate to see you waste it on a POS booster, not that I konw as I cant look at the link you posted.
2006 Ram, 5.9 cummins HO. 4 cell design, 1.5 LPM@30amp, 24.3 MPG