9mm Stoney Point bullet comparator insert ?

[CanFire]

Last year I picked up the Stoney Point Bullet Comparator kit that includes 6 inserts (Model #B234-678). The back of the package describes the six inserts as: .224(5.556mm), .243(6mm), .257, .277, .284(7mm), .308(7.62mm/8mm). Did they (or anybody else) ever make an insert for 9mm Luger? I've just been using the 8mm one for my own internal use, but since it isn't measuring to the proper ogive on the bullet I can't really share/compare what my cartridge lengths are with other people.