Dave, try Chris Holland. When he bought my SM wheels for his 2013 Six Days he rang me and said that the caliper spacer I'd sold him (that I was using on my 2007) didn't fit: the caliper bolt spacing was different on his model. Not sure how he overcame the problem - doubt he could have modified the spacer I supplied him? - so, you might be lucky in that he has the one I sold him which would/should fir your 530.
