Hi. We had the same problem with a simpson dishwasher. I talked to our local electric guy and he said that on a lot of dishwashers there is an adjustable bolt up under the top where the catch goes in and if I adjust this up a little (I used an alan kay) it will stop the dishwasher from leaking. Saved us a fair bit as seals for this model were not cheap. Maybe worth a try !
Chris.