The replacement for the famous M-Bolt to go through the bumper and hold the front tow hooks is called a 'Stud Plate' and the part number "appears to be" #52059352AA and this fits inside the frame and takes two M10x1.5 Nuts (part#06504818AA). These mount in the two outside holes (towards the fenders) holding the hooks on. The reason I say "appears to be" is because a search for this part number yeilds at replacement number of #52059352AB which is listed as a Stud Plate mount for the radiator.

(Gotta love Chrylser, hunh?)
The inside mounting hole, requires a 'U-Multi Thread Nut'. This is mislabelled in the 2004 Parts Manual so I cannot tell you what the proper part # is but I it appears to take a Hex Head M10x1.5x28 Screw & Washer (part #06503699).
Now, the bigger problem is that most of the parts houses that I have checked with don't have these parts listed in their systems, but at least this should give most a starting place to try and work out proper hardware on their own.