Anyone have information that might help me locate stock 4th gen Subaru LGT springs?

I've got a brother who bought a cheaply lowered LGT and wants to get stock springs back on there (he doesn't into rallyX) but my knowledge is based on the impreza and foresters and i aint going hunting on NASIOC if i can help it. Are all years of this gen (2003-2009) compatible? What about the difference between non-gt and gt? Wagon springs? Are there other Subaru's or legacys that would work for compatibility? I was going to start hunting around on my local classifieds and see what I can find. In Utah there should be no shortage of stock Subaru coils, as well as check out places like RallySport direct and Cobb. Thoughts?