I don't know by part number, but I know by application.

The alternator is a re-manned 05-08 5.7 car unit and my ps pump is an 03-08 5.7 car.

I'll use an external reservoir on the PS pump. Just factory stuff mounted to the fender. The easy thing to do would be to get a Jeep SRT8 Powersteering pump, with the built in reservoir...but I've not come across one for thr right price yet.