It is still in the works according to SPL. They are waiting to get their shop Z32 back up and running so they can test the arms. I make sure to bother them every 6 months or so and ask if they have made any progress. GKTech also has the same kind of design FUCA that has just been, or is just about to be released. The only problem is that they are producing it for the R33 I believe so the arm has an offset design that the Z32 doesn't use. It looks like it could be easily adapted if you were to have some custom spacers machined to correct the offset.