Hi again:
That part isn't an available. The only suggestion I can give is to have a coil mount removed from a salvage vehicle and have it welded on to your vehicle. It will not be an easy job. Also, if you decided to have that done, make sure you find someone qualified to do the welding. That holds the weight of the vehicle and you do not want it to break while you are driving.
I wish I had an easier answer. I have seen coil spring mount repair kits, but I have no idea how well they work. Google "2004 Jeep Grand Cherokee Coil Mount repair kit. I know you will find them.
Let me know if that helps or if you have other questions.
Joe
Tuesday, October 23rd, 2018 AT 4:59 PM