Side of frame mounted gas tank???

[OrrieG]

I have been looking for a recent thread that showed what I seem to remember was a later model suburban gas tank mounted on the driver side between the frame and drive line. I posted asking what the tank was from, but cannot find the thread?? I searched looking for my posts and it doesn't show up, searched for gas tank threads and cannot find it either. A nudge in the right direction would be helpful! Thanks in advance.

And you guys have a safe and happy new year. Its trying to snow here...