I'm looking for a way to get an apparently discontinued impeller kit vs. replacing my entire motor/pump assy. on my dishwasher. The chopper assy had some broken glass get into it and that took out the vanes on the impeller that drive the chopper assembly. It looks like these motors and volute pieces intercgange with some other models such as DU1055XTSB2 and a few others that look they still offer the impeller kit at about $17.00 versus spending $150-$190 for the complete assy. Am I crazy to go cheap and not do the whole thing while I have it apart?