The EKAT is very handy if you want to find out the replacement parts for your Festool machines.
But you can only write down the partnumber and look at the estimated price.
And then you have to go to your dealer and order the partnumber at the local store or web-shop if available.
Be aware of extra costs for ordering some small parts if the dealer himself has no plans to order something else from Festool.
At least ask for it!
But it's a great service and most parts are available for at least 10 years.