My 2008 SE V8 feels like it has the suspension of a trampoline. I have posted this complaint on here in the past and received a forward to an air assist package for my existing suspension. I am thankful for the response and recommendation and have thought on it for quite some time. The only reason I haven't acted on it is that to me this feels like a band-aid to the bigger problem IMO. As referenced in the subject line, I am looking to beef up the suspension

I feel somewhat cheated by the typical suspension vendors (SkyJacker, ARB, OME, TeraFlex, etc.), everything they have in the Nissan truck family appears to be for the Titan, Frontier, or XTerra.
Responses are most welcomed.
Thanks,
KG