I repaired this problem on my own Whirlpool fridge (your parts diagram is the same as mine) with a metal bracket that I designed and installed myself (see photo). I can supply detailed, step-by-step instructions, complete with lots of photographs, to do this repair. I get these brackets water-jet cut in quantity so the quality will be good.
I will sell the instructions, bracket, and attachment screw for $70, or a more complete kit with the bonding compound, drill bit, and chisel (so all you need is a drill and screwdriver) for $100. I think this is fair for the development time, prototypes, and mass production costs involved, and is far cheaper than the $560 Whirlpool wants for a new door. You can do this repair with the freezer door in place, and it should take you only about 2 hours, not counting the 24 hrs to wait on the bonding compound to set up.
E-mail me (jeff at lentzclan.com) if you're interested, and please put "refrigerator" in the subject line. This repair was done on Whirlpool side-by-side refrigerator model ED5JHGXRQ (white), but should also work on ED5JHGXRT (Biscuit), ED5JHGXRB (Black), and ED5JHGXRL (Stainless-VCM).
DISCLAIMER: I've also found out there is a Whirlpool Dispenser Hinge Kit, #8201756, that has a thin metal piece similar to the one I designed above, and it costs less. I'm certain the instructions are not as thorough, and I can't tell you anything about the models it works on. I'm not even sure it is a genuine Whirlpool kit. But in full disclosure, I have to tell you it's out there, available from Amazon.com and other places Google may direct you to.