I am a big fan of Husqvarna, but they are not what they once were when it comes to delivery and service.
Before they had the updated IPL's, they had a website where customers could browse parts lists......ie, the service is not available since they upgrade to a better system....something they have been with for a good year and are still working on.
One of the interesting things with 550, 560, 562, was the changes they made along the way, there was not much left of the starting point when the series came to an end and mk2 came. It made some sense to see the IPL updates with the notes they had.
Over at yours, 592, 572, 562, especially the two first, available spare parts for the two should be a priority to have available, really a minimum requirement......