I have a TR 102mm in my Husaberg 450 (518cc). It was done before I bought the bike but talking to Travis about it he said that the cylinder is the same for the KTM 450 and berg 450. I would assume that the height is the same for the 530 and the 570, but with different bores. Wouldn't really make sense for KTM to make 6 different cylinders for the 390/400, 450's, and 530/570.
I sold him the original cylinder (which came with the bike) so he could use it as a core, I suspect that it will end up on a KTM as there are just more of them.
BTW-it is an awesome motor.