Did some checking and Whirlpool (who makes the dishwasher) doesn’t sell the seal and now wants to sell the sump unit and seal combo for close to $200. Found that a 6x16x5 oil seal will work from TCM ( part #TCM 6x16x5SC-BX). TCM is in Minnesota; their number is 800-328-2840 but I got the parts from a local dealer. You have to remove the lower wash arm motor and then use a screwdriver or pick to remove the old seal. Use some silicone grease on the new seal and insert in the slot, then replace the motor. Glad I gave it a shot since this was a $5 repair. What a ripoff from Whirlpool!