It is highway robbery!! But such is the state of affairs with buying parts from most of corporate America these days.
I had an idea on those racks. A year ago or so, they called saying that they had an awful burning smell in the apt. Before I could get over there, they called to say that they found a piece of plastic in the dishwasher that had melted in the dishwasher (on the heater element). My guess is that the plastic fumes from the burning plastic weakened the vinyl coating on the racks. It is the only semi-rational reason that I can come up with for this premature failure.
Now the search for racks or maybe a new DW.