Hey Pit Bull!! I bought an Aero, Diamond Plate 45 gal, in-the-bed Aux. tank last March. I put that sucker in and I LOVE IT! The only thing is that I can't find a locking gas cap which doesn't leak. The stock cap they gave me doesn't leak, but it doesn't lock either. The tank is very well built, welds are all very professionally done etc. When I got mine it had some dust in it, so I rinsed it out with a quart of #2, other than that it is great.
This is a true Aux. tank, with all the outlets to run legal, but I hooked it up as a transfer tank, with a big old NAPA fuel filter/water separator mounted in-line, and a switch and green led mounted on my gauge pod. So far I have never over-filled it--knock on wood. If I was coming back that way soon, I'd pick one up for you. Aero is just over the hill in Corona, which isn't too far from me.