6.1 no p/steering no a/c pulley

I've not looked at a Grand Cherokee setup before. By the looks of it, that stuff is sucked up really close to the block compared to passenger car stuff. Look at your water pump pulley compared to the other photo in this thread. Yours is set way back over the pump.

I'm not sure the aftermarket one's would work either. Maybe the chrome one in the thread and you can modify the spacer length. The other option is just to hack off the mounting boss, cut to length and have a plate welded on for a new mounting flange.