The boost controller on my car is a grainger style manual boost controller that only set me back about $40. I couldn't justify the extra cost of an Electronic one, but they do have their benefits.
As far as the Coilovers go I know Modern Moterspports sells them for the rear(not sure about the front) But if you call Techno Toy Tuning they can make you some, but coilovers are going to be expensive, a good amount over $1,000. I am about to order all my suspension stuff, Cusco strut bars, Sway bars and because money is tight I will probably end up going with Tockico springs and shocks(only $350 shipped).
My personal opinion is that if we had a S130 section it would be dead, maybe it would work though?? Zdriver.com has a pretty could 280zx forum but there really isn't too much tech talk over there, but it is still a real good site. And besides the S130 and S30's have a lot of similairities.
Rob