Most stuff is interchangeable between KTM, Husqvarna and Husaberg, its just a matter of figuring out what matches what. You dont mention whether your bike is offroad or SuMo, if its offroad, any KTM fork guards will fit from around 2000 and up, and Husqvarna from 2014 and 2015 will also fit, if you want them yellow. If you want blue, and cannot find OEM Husaberg fork guards, the fork guards for most TM Racing bikes from around 2005 to 2012 will fit. They are basically a blue version of the pale fork guards found on Honda dirtbikes with Showa suspension. As for the Magura levers, there are a few different ones on the KTM's throughout the years, just try and match up the part numbers. KTM used Magura clutches on all their dirtbikes from about 2000 to 2007, and after that some changed the clutch to Brembo while some,(mostly twostrokes) still used Magura. I worked on a 2017 Husqvarna 300 twostroke a few days ago, and it had a Magura clutch.
I'm not too certain exactly which years KTM used Magura brakes, I think it would be mostly the later years, I'm guessing from about 2008 the SMR KTM's may have had the Magura brake master. The older SMR's I believe had the Beringer setup, though some of them had Brembo as well.
Check out Munn racing.com, they have parts fiches where you can compare the part numbers. Hope this helps.
Also, there was an SXS 570 kit for the KTM 530(2008 to 2011) which was basically a Husaberg 570 conrod, piston, cylinder, camshaft and CDI unit. So if you are looking for engine parts and such for your Berg, the KTM 530 will be your best bet to find a match.
Hope this helps