The small seal in the sump that seals the diverter motor shaft is not available separately from the sump. By the time you buy a bare sump, diverter motor and clamp, you're only $20-30 away from buying the entire pump/motor/sump assembly. Remove dishwasher from counter, lay on its back and change the assembly. Less than 45 minutes later it was fixed and washing dirty dishes WITHOUT leaks :). TIP: use rinse agent to lubricate all seals/o-rings for reassembly.