That isn’t necessarily true. Many companies stop making certain parts for major appliances after the 7 year mark – depending on demand. Your appliance is 10 years old and your particular model, there just might not have been a demand for it. This was true even when Maytag was a stand alone company. And as of right now, there are hundreds of models that were manufactured by Maytag (prior to the sale to Whirlpool), that is currently available and still produced by Whirlpool.
This is a fast moving industry and with its constant updates, changes, and new technology that’s thrown out at us (the everyday consumers), what may have been available for your appliance a few years ago just may not be available now. And while this doesn’t help you now, it also isn’t due to Maytag/Whirlpool’s negligence.