I used a SK Fiber TT 55 "A" as a replacement for a SK Fiber Pure Energy "A" tipped 1" in an Integra 450 built at 47"s that the client broke. According to Jeff Summitt this is the closest match I could find and it was exactly that. Same trajectory and same shaft characteristics.
I would not look past these shafts as they are very good. The only other Hireko carried shafts that I like are Graman.