Getting Parts For Newer SQs
There is probably no reason to buy any parts now for these machines,
This W&D are so reliable that unless you are doing more than 10 loads a week it is very likley that they will require NO SERVICE for more than a decade.
And the parts you are eventually going to need will be readily available for more than 20 years.
If you were willing to stash parts so you could repair the machines instantly and did not care that you would be spending several hundred on parts that 70% of would never be used I would get the following parts for the washer.
A belt, an inlet valve, a timer, a water pump and maybe a spare motor.
For the dryer, A belt ,a set of rear rollers and a timer, and again maybe a motor.
John L.