hg2,
Try
http://www.hypertech.com/ or
http://www.diablosport.com/. Hypertechs are good for what they do, but it's still not the same control as the sniper system. OF course, they may have upgraded by now. My experience is a few years old. I know nothing about Diablosport.
Bob,
I found a few things that work on Toyota, but you'd have to go and drop a few bills on a new one. You could always turn your truck into a Toylet and make things work.

4.3L fit nicely in there.