I think you should look towards getting an STM slipper clutch, i think the part number is FHS-M040, considerably cheaper than the KTM part and possibly better too.
i got the STM one cheap thankfully, i did a cross check with STM on the ktm ones and they do have different part numbers. maybe if the baskets have the same PN between the 530 and the 570.
2008 onwards 450/530 EXC-R clutches are interchangeable with the FS570. They use the same part numbers for the basket. I got fitting instructions for Berg and KTM with my Hard parts (Adler) clutch.