Yes I have Godspeed 2 piece disks slightly larger in diameter and width although this is part of the kit.
Think they are a similar price to 1 piece Alcons but godspeeds are grooved, thicker so last longer plus when it comes to needing new disks again you only need rotors (the part where your pads touch) which is only £300ish.
Still expensive but nothing near £700
Imprezas are not cheap but in my eyes well worth the money.