Datsport sell their caliper brackets separately to suit the non turbo R31 struts. Last time I bought a paid they were $95 AU a side. Then just get a pair of S12 hubs or Z31 5 stud hubs, bolt the matching rotor for the calipers you have, and it bolts together.
Note you do need to drill and thread the standard caliper mounts, but not hard to do.
You should pm monty with the 180b as he has done this type of thing and has learnt some lessons. I bought the datsport kit cause I am lazy, but he has fitted an r32 strut and calliper in i think, very tidy