Do you mean like this. I got these pictures off either 4x4 Wire or the Pirate board. Was a custom job if I remember. I had checked into this at a local turbo shop and the owner said it would be fairly easy to do using existing parts from other turbo cars.
I'll have to find more info on this modification from the original website. There are some other pictures of a massive intercooler etc. This is installed in a truck but the Runner wouldn't be much different.