I recently replaced an actuator on my first generation In-sink-erator supreme dishwasher by a local mom and pop appliance repair company called Lee's Appliances based in Brisbane, CA. Lee only repairs stoves and dishwashers. Last year I had him replace an ignitor on my 1980 Magic Chef Built-in gas oven. He's an old time repair guy and full of information especially if you are in the market for new trouble prone appliances that he has repaired. I need to warn you that Lee's Appliances is not cheap but good and quick.
Thank you for the suggestion of Lee's in Brisbane... sounds like a winner.
Combo52 said the 22 rack is not compatible with the 23 rails, but no one has mentioned the 24. Would that have been similar to the 23? I don't happen to have one of those, though.